Marine Guidance Notices

Load line instructions for surveyors (MSIS 1)

Instructions for the guidance of surveyors completing survey work for the Maritime Coastguard Agency. Find out more. 

MSIS 2 The ISM Code

For the guidance of surveyors auditing safety management systems both at sea and ashore. Find out more. 

Passenger ship construction: classes I, II, and II (A) (MSIS 3)

Instructions for guidance of surveyors. Find out more. 

Passenger ship construction, classes lll to Vl(A) (MSIS 4)

Instructions for guidance to surveyors, on maritime and caastguard Agency (MCA) construction standards and policies. Find out more.

Mandatory radio installations on ships (MSIS 05)

Instructions for the guidance of surveyors in survey and inspection of ‘GMDSS’ radio installations on ships for the purpose of ensuring compliance with the various Statutory Instruments covering merchant shipping. Find out more.

MCA survey of lights and signalling equipment (MSIS 10)

Instructions for the guidance of surveyors, about inspecting ships’ navigation lights, sound and visual signalling equipment. Find out more.

High-speed craft code 1994 (MSIS 11)

Instructions for the guidance of surveyors; it gives a full set of requirements for the design and building of HSC. Find out more.

Fire protection arrangements (MSIS 12)

For the guidance of surveyors in surveying fire protection arrangements to ensure compliance with requirements covering merchant ships. Find out more. 

Survey of life saving appliances: volume 1 (MSIS 14)

Part MSIS 14 of the instructions for the guidance of surveyors. Find out more. 

High-speed craft international safety code 2000

Instructions for the guidance of surveyors (MSIS 24), about the International code of safety for high-speed craft (HSC code), 2000. Find out more. 

Survey and inspection of fishing vessels chapters 1 to 17 (MSIS 27)

Instructions for the guidance of surveyors, which covers the survey of fishing vessels. Find out more. 

Domestic Safety Management code: Instructions for surveyors (MSIS29)

Domestic Safety Management code (DSM) (MSIS 29) for the safe operation of ships and for pollution prevention. Find out more. 

International HSC code 2000 (2008 Edition) (MSIS 34)

This code shall be applied as a complete set of comprehensive requirements. Find out more. 

MSIS 41 International load line

Instructions for the guidance of surveyors on international load line. Find out more. 

MSIS 42 Damage stability SOLAS 2020 amendments

Instructions for the guidance of surveyors on damage stability SOLAS 2020 amendments with explanatory notes. Find out more.

MSIS 43 Intact stability

Instructions for the guidance of surveyors on intact stability IMO 2008 is code and explanatory notes. Find out more.

MGN 7 Training, certification guidance part 7

STCW 95 provides for CoC combining deck, engineer and radio competencies to be issued under regulation VII/1 – alternative certification. Find out more. 

MGN 12 (F) Fishing vessels operating in submarine exercise areas

Describes measures implemented by the royal navy to minimise the risk to fishing vessels in submarine exercise areas. Find out more. 

MGN 12 (F) Amendment 1: operating in submarine exercise areas

Amendment to marine guidance note 12 relating to fishing vessels operating in submarine exercise areas. Find out more.

MGN 26 (M) High-speed craft training: further guidance

Guidance on high speed craft training – course approval and certification. Find out more.

MGN 36 Carrying dangerous goods in packaged or dry bulk form

Guidance on requirement for a document of compliance and the special requirements for ships carrying dangerous goods. Find out more. 

MGN 37 Merchant shipping regulations: dangerous goods and pollutants

Explains the implications of the The Merchant Shipping (Dangerous Goods and Marine Pollutants) Regulations 1997. Find out more.

MGN 38 (M+F)Contamination of ships air conditioning by legionella

Guidance on the risk and transmission of Legionnaire’s Disease via air conditioning plants and counter measures. Find out more.

MGN 50 Manning of pilot boats

Marine accident investigation branch Recommended that all pilot boats should be manned with a minimum of two crew including the coxswain. Find out more.

MGN 52 Testing emergency sources of electrical power

Regulations require periodic testing of the complete emergency electrical system including any automatic starting arrangements . Find out more. 

MGN 70 (M) Amendment 1 Guidelines on responsibilities for resolution of stowaway cases

MGN 70 (M) Amendment 1 includes a new reporting procedure for UK-flagged vessels coming to the UK, non UK-flagged vessels in UK waters and UK port facilities discovering a stowaway incident. Find out more. 

MGN 71 (M+F) Amendment 1: Musters, drills, on-board training and instructions, and decision support systems.

This note and annex provides guidance to the relevant requirements in the Regulations in respect of musters, drills, on-board training and Decision Support Systems. This Amendment changes only formatting of the document and updates legacy references. Find out more.

MGN 83 Specifications for hyperbaric evacuation systems

Advises on the guidelines and specifications of hyperbaric evacuation systems to be provided for the evacuation of divers in saturation. Find out more. 

MGN 83a Guidelines specifications hyperbaric evacuation systems

Amendment to MGN 83a. Find out more. 

MGN 108 (M) Hull stress monitoring systems

Recommendation for the fitting of hull stress monitoring systems on bulk carriers of 20,000 dwt and above. Find out more. 

MGN 123 (M+F) Amendment 2 Certificates of Discharge

Details on the requirements for seafarers and fishermen to be given a written record of their work, titled as a certificate of discharge. Find out more. 

MGN 132 (M+F) Electrical equipment, maintenance and incidents

Draws attention to incidents with electrical equipment, maintenance responsibilities and the use of thermographic imaging as a maintenance tool. Find out more. 

MGN 137 (M+F) Look-out during periods of darkness and restricted visibility

Reminder to all UK ships and other ships operating in UK territorial waters, of the legal requirements for keeping a proper look-out during the hours of darkness. Find out more. 

MGN 141 (M) Man overboard smoke signals parachute flares on class VI passenger vessels

Offers certain Class VI passenger vessels an alternative arrangement for the carriage of man-overboard smoke signals and parachute flares. Find out more.

MGN 164 (M) STCW 95 Part 18: Conversion of Tonnage

Merchant navy deck officer CoC’s are limited to service on vessels measured in gross tonnage (GT) rather than gross registered tons (DRT). Find out more. 

MGN 164 (M) STCW 95 Part 18: Conversion of Tonnage

Merchant navy deck officer CoC’s are limited to service on vessels measured in gross tonnage (GT) rather than gross registered tons (DRT). Find out more. 

MGN165 Amendment 1 (F) fishing vessels: risk of flooding

This notice provides guidance on how to reduce the risk of flooding and the action to take if flooding occurs. Find out more. 

MGN 168 (M + F) The marking of seismic streamers

Seismic streamers that are being towed represent a potential hazard to navigation and should be marked with tail buoys. Find out more. 

MGN 190 (F) Copper pipe failure in engine cooling water systems

Advises of possibility of premature pipe failure due to fatigue when pipes are incorrectly mounted, or subjected to in service vibration. Find out more. 

MGN 197 Amendment 1 (M+F) Implementation of council directive 2013/59 euratom

Council directive 2013/59 euratom laying down basic safety standards for the protection against the dangers arising from exposure to ionising radiation. Find out more. 

MGN 198 (M) Safety at solid bulk cargo terminals

Draws attention to obligations, responsibilities placed upon terminal operators involved in the loading and unloading of solid bulk cargoes. Find out more. 

MGN 199 (M) Dangers of interaction

Draws attention to effects of hydrodynamic interaction on vessel manoeuvrability and describes some incidents which illustrate the dangers. Find out more. 

MGN 203 (M) Crew training for domestic passenger vessels

Details minimum level of training for concessionaires and crew, working on board UK domestic passenger ships of classes IV to VI (A). Find out more. 

MGN 210 (M) Advice on the dangers of flooding of forward compartments

Draws attention to precautionary measures against dangers through flooding of forward compartments. Find out more.

MGN 218 (M) Thames safety inquiry recommendation 27.2

MCA policy statement on the development of standards in new safety regulations, new and existing ships, following Thames safety inquiry. Find out more.

MGN 223 (M) Carriage of coconut oil and other vegetable oils

Draws attention to the hazards and makes recommendations to ensure safe working practices when handling coconut and vegetable oil as cargo. Find out more. 

MGN 231 (M+F) Shipboard pollution emergency plans

New international requirements, effective 01 January 2003 for provision of shipboard pollution emergency plans. Find out more. 

MGN 242 (M+F) Format and procedures for reporting safety incidents

Standard reporting format and procedures for reporting incidents involving harmful or dangerous goods & substances. Find out more. 

MGN 245 (M) Inspection of shell loading doors on ro-ro ferries

Importance of crew members on roll-on roll-off ferries being aware of position of collision bulkhead – need for it be kept fully intact. Find out more. 

MGN 248 (M) Safety preparations prior to machinery maintenance

Procedures for the isolation of machinery prior to maintenance to be included in planned maintenance system. Find out more.

MGN 258 (M+F) Decommissioning of halon systems

Advises of the decommissioning of halon as a fire-extinguishing medium because of its damaging effect on the stratospheric ozone layer. Find out more. 

MGN 266 (F) Interpretation of SOLAS chapter 5 for fishing vessels

Gives a summary of SOLAS chapter 5 regulations, and how they apply to fishing vessels registered in the UK. Find out more. 

MGN 267 (F) Location, stowage of liferafts and radio beacons on fishing vessels

Guidance on stowage positions and other measures that will significantly reduce the possibility of a liferaft or an EPIRB becoming trapped. Find out more. 

MGN 271 (M) The protection of windows and side scuttles

Statutory requirements for fitting and use of hinged deadlights and permanently attached storm covers at windows and side scuttles. Find out more. 

MGN 272 (M) Voyage data recorders: performance testing

Explains how voyage data recorders (VDRs) should be tested after installation and annually thereafter. Find out more.

MGN 272a (M) Voyage data recorder: performance test certificate

Annex 1 to marine guidance notice 272 contains a voyage data recorder performance test certification. Find out more. 

MGN 273 (M) Operational issues relating to marine evacuation systems

Outlines a potential lifejacket safety issue and highlights the need for guidance on evacuating infants and people with disabilities. Find out more. 

MGN 276 (M+F) Amendment 1: Fire protection – maintenance of portable fire extinguishers

Maintenance intervals of portable fire extinguishers. Find out more. 

MGN 279 (M) Certificate of competency as compass adjuster

Details the new requirements for experience prior to examination for a certificate of competency as a compass adjuster. Find out more. 

MGN 280 (M) Construction standards for small vessels in sport use

Contains the small commercial vessel (SCV) code text and advises how the standards of the SCV code may be used for already coded vessels. Find out more.

MGN 281 (F) Fishing vessel freeboard & stability booklet format

Guidance note recommending a common format for stability information booklets for use on board fishing vessels. Find out more. 

MGN 282(M) Carriage of dangerous goods on offshore supply vessels

Explains how offshore supply vessels should comply with the international maritime dangerous goods (IMDG) code and chapter VII of SOLAS. Find out more.

MGN 283 (M) Back loading of contaminated bulk liquids

Standard when loading and back loading bulk liquid and the procedure to be followed before commencing the back loading to comply with IMDG. Find out more. 

MGN 285 (M+F) Electronic charts operating ECDIS in the RCDS mode

How to conduct a risk assessment before using an electronic chart system in raster chart display system (RCDS) mode for primary navigation. Find out more.

MGN 290 (M) Local passenger vessels – manning

Statutory requirements for operators of passenger vessels to ensure that there are sufficient crew for the safe operation of the vessel. Find out more. 

MGN 291 (F) Fishing vessels: fire detection and alarms

Advice on the selection of fire detection and alarm equipment – need for automatic fire detection in enclosed spaces on 15m to 24m vessels. Find out more. 

MGN 293(M+F) Alternative arrangement for paper chart requirements

Sets out alternative ways that certain smaller vessels operated under MCA codes of practice may satisfy paper chart carriage requirements. Find out more. 

MGN 296 (M) Medication at sea

Potential effects on performance of prescription and or over the counter drugs. Find out more.

MGN 297 (M) The carriage of defibrillators on ships

Amendment 1 advises on risk assessment, for operators of UK passenger ferries and high speed passenger craft to determine whether to carry defibrillators. Find out more. 

MGN 299 (M+F) Inappropriate use of mobile phones whilst on duty

The use of mobile phones at inappropriate times is distracting bridge management teams from their primary duties of navigating and conning their vessel. Find out more. 

MGN 301 (M+F) Amendment 1: Manoeuvring information onboard ships

Amendment 1 of this guidance note details the requirements for manoeuvring information in the form of a pilot card, wheelhouse poster and manoeuvring booklet. Find out more. 

MGN 305 (M+F) Amendment 1 Barring of INMARSAT ship earth station procedures

Advises about potential consequences of non-payment for services provided to a ship by land earth stations operating in the INMARSAT system. Find out more. 

MGN 306(M) Amendment 1 – Designing and operating smaller passenger vessels: guidance on meeting the needs of persons with disabilities

Guidance for designers and operators of small passenger ships to take into account passengers with disabilities, and mobility issues. Find out more. 

MGN 310 (F) Fishing vessels: risk of fire, explosion and burning

Provides advice and a reminder on the safe use and handling of gas welding and burning equipment. Find out more. 

MGN 311 (F) Working and protective gear for fishermen

General advice on the supply and use of working and protective gear (personal protective equipment (PPE)) on fishing vessels. Find out more. 

MGN 312 (F) Liquid petroleum gas and diesel fuelled appliances

Advice on reducing the risk of explosion or carbon monoxide poisoning from the fitting and use of petroleum gas and diesel fuel heaters. Find out more. 

MGN 313 (F) Keeping a safe navigational watch on fishing vessels

Explains the need to maintain a proper navigational watch at all times. Find out more. 

MGN 314 (F) Wheelhouse visibility onboard fishing vessels

Wheelhouse visibility requirements for all fishing vessels. Find out more. 

MGN 315 (M) Keeping a safe navigational watch on merchant vessels

The application of certification and watchkeeping for seafarers 1978, ( STCW 95 amended) regarding the keeping of a safe navigational watch. Find out more. 

MGN 316 (F) Re-applying paints and varnishes to interior surfaces

The do’s and don’ts on the re-application of paints, varnishes and other finishes to interior surfaces on fishing vessels. Find out more.

MGN 319 (M+F) Amendment 2 – Acceptance of electronic chart systems for fishing vessels and small vessels in commercial use (code boats) up to 24 metres in load line length (SV-ECS)

Guidance on the use of SV-ECS on small commercial vessels up to 24 metres in load line length. Find out more. 

MGN 321 (M) Amendment 1 AIS on double-ended passenger ferries

Guidance and information on the requirements for AIS carriage on double-ended passenger ferries, and the specific arrangements for ensuring AIS has correct heading input, regardless of direction of travel. Find out more.

MGN 322 (M+F) Ship survey standards

Survey standards for hull construction, machinery, electrical and control systems which vessels are expected to be built and maintained. Find out more. 

MGN 323 (M+F) Amendment 1 Explosives picked up at sea

Guidance for actions to take in the event of explosives (including Phosphorous devices) being picked up at sea. Find out more. 

MGN 324 (M+F) Amendment 2 navigation: watchkeeping safety – use of Very High Frequency (VHF) radio and Automatic Identification System (AIS)

This guidance note highlights appropriate use of the AIS and VHF marine radio for collision avoidance. It also includes key points from IMO circular regarding use of AIS aids to navigation. Find out more. 

MGN 325 (M) Helicopter assistance at sea

Provision of facilities for emergency helicopter operations on sea-going ships which do not have a helideck & emergency contingency plans. Find out more. 

MGN 327(M) High speed craft dynamic stability research

Research Project 502: Design guidance on high speed craft dynamic stability in following and quartering seas. Find out more. 

MGN 328 High-speed craft dynamic stability in following, quartering seas

High-speed craft are known to suffer some degree of difficulty in following and quartering seas, including behaviour surfing, bow diving and broaching. Find out more. 

MGN 330 (M+F) Radio aerial lead-ins

Draws the attention to the dangers from exposed aerial lead-ins and the measures that should be taken to reduce the risk of injury. Find out more. 

MGN 340 IMDG code and cargoes carried in cargo transport units

Information on cargoes that may be a risk on vessels and cargoes classed as dangerous under the international maritime dangerous goods code. Find out more. 

MGN 341 Ro-ro ships’ vehicle decks: accidents and access

Highlights the dangers to passengers and crew of moving vehicles during operations on board roll-on and roll-off ships. Find out more. 

MGN 342 Carriage of dangerous goods for sale on UK ferries

Outlines compliance with the international maritime dangerous goods code when transporting limited quantities of retail goods on ferries. Find out more. 

MGN 343 Hydrostatic release units: stowage and arrangements for liferafts

Guidance on the securing, stowage and launching of liferafts, and the fitting of the most common types of hydrostatic release units. Find out more. 

MGN 344 Observations from passenger vessel evacuation exercises

Reports the findings of a series of trials and evacuation exercises undertaken or witnessed by the Maritime and Coastguard Agency. Find out more. 

MGN 347 Vessels where certificates state a limiting number of passengers

Guidelines about the unit weight of passengers and vessels where certificates state a limiting number of passengers. Find out more. 

MGN 349 (M+F) Amendment 1 Carriage and use of radar reflectors on small vessels

Guidance on the recommended installation of radar reflectors on vessels less than 15m in overall length. Containing an explanation of the ISO 8729 standards. Find out more.

MGN 353 (M+F) Control of vibration at work regulations 2007

Amendment 2 outlines guidance on the requirements for the protection of workers from the risks related to exposure to vibration at work. Find out more. 

MGN 354 Safe operation of fixed CO2 gas fire extinguishing systems

Guidance to the crew for the safe use of fixed CO2 gas fire extinguishing systems. Find out more. 

MGN 355 Maintenance of fixed bulk dry powder fire systems

Draws attention to guidelines for the proper maintenance and testing of fixed bulk dry powder fire extinguishing systems. Find out more.

MGN 357 Night time lookout: photochromic lenses and dark adaptation

Guidelines about avoiding the use of photochromic lenses and allowing time for dark adaptation when undertaking lookouts at night. Find out more. 

MGN 358 CERS reporting requirements for port waste and bulk carrier infringements

Explains the reporting procedures being implemented by MCA through the European consolidated reporting system (CERS). Find out more. 

MGN 360 Changes to routeing measures in electronic navigational charts (ENCs)

Information on how the UKHO will issue future changes to routeing measures in electronic navigational charts. Find out more. 

MGN 364 (M+F) Amendment 2 navigation safety: traffic separation schemes – application of rule 10 and navigation in the Dover Strait

Provides Mariners with guidance on the application of COLREG within traffic separation schemes within UK waters and navigational information, include mandatory reporting guidance within the Dover Strait. Find out more. 

MGN 366 (M+F) Amendment 1 Off-shore pirate broadcasting

It is an offence to establish and use an unlicensed broadcasting station on board ships either within or outside UK territorial limits. Find out more. 

MGN 367 Approval fixed fire detection alarm systems balconies

Concerns a circular issued about approved fixed fire detection and fire alarm systems for cabin balconies on passenger ships. Find out more. 

MGN 369 (M+F) – Amendment 1 Navigation Safety: Navigation practices relevant to restricted visibility

Provides guidance on the rules applicable in restricted visibility as well as guidance rules within Part A and Part B Section I, which may be applicable in all states of visibility. Find out more. 

MGN 370 (M+F) The Dreadnought Medical Service, St Thomas’ Hospital London

Amendment 1 advises seafarers on the Dreadnought Medical Service at Guy’s Hospital and St Thomas’ NHS Foundation Trust in London. Find out more. 

MGN 372 Amendment 1 (M+F) Guidance to mariners operating in vicinity of UK OREIs

This Marine Guidance Note (MGN) highlights the issues to be considered when planning and undertaking voyages in the vicinity of offshore renewable energy installations (OREIs) in UK waters. Find out more. 

MGN 374 (M+F) Amendment 1: Periodic inspection and testing of seamless steel pressurised gas cylinders

Recommended standards for the inspection and testing of pressurised seamless steel gas cylinders for fire fighting appliances and other onboard purposes. Find out more. 

MGN 375 (M+F) Maritime safety information Amendment 1

Maritime Safety Information (MSI) is defined in the Safety of Life at Sea (SOLAS) Convention, Chapter IV as “navigational and meteorological warnings, meteorological forecasts and other urgent safety related messages broadcast to ships.” Find out more.

MGN 379 (M+F) Amendment 1: use of electronic navigational aids

This Note emphasises the need for correct use of electronic navigational equipment by watchkeepers. Find out more. 

MGN 381 (M+F) Air pollution: survey and certification requirements

Guidance note details requirements for the merchant shipping (prevention of air pollution from ships) regulations 2008. Find out more. 

MGN 382 (M) Fire protection of balconies and other external areas

SOLAS amendments for passenger ship cabin balconies and fire protection and suppression system requirements. Find out more. 

MGN 383 (M+F) United States clean water act

Information about the U.S. Clean Water Act and compliance with the Environmental Protection Agency’s vessel general permit (VGP). Find out more. 

MGN 384 (M+F) Amendment 1 Training in the maintenance of electronic navigational equipment

Training in the maintenance of electronic navigational and communication equipment on merchant ships. Find out more. 

MGN 386 (M+F) Prevention of air pollution from merchant shipping

Survey and certification requirements with reference to air pollution from ships and clarification of the term important repair. Find out more. 

MGN 389 (M+F) Fixed gas fire-extinguishing systems

Guidance regarding the use of operating instructions and signage for fixed gas fire-extinguishing systems. Find out more. 

MGN 393 (M+F) Maintenance and use of new technology light sources

Provides guidelines on the requirements and performance standards, for new technology light sources as required by the IMO. Find out more. 

MGN 394 (M+F) Amendment 1: Local supplier of fuel oil registration

Contact details for the local suppliers of fuel oil for registering and making an annual declaration. Find out more.

MGN 396 (M+F) Compatibility of life-saving equipment

Guidance on compatibility issues concerning the joint use of immersion suits and lifejackets. Find out more. 

MGN 398 (M+F) Amendment 1: The merchant shipping (anti-fouling systems) regulations 2024

Guidance on interpretation of The Merchant Shipping (Anti-Fouling Systems) Regulations 2024. Find out more. 

MGN 400 (M+F) Amendment 1: Additional guidance on air pollution from ships

This MGN provides guidance on the SOx requirements under the Prevention of Air Pollution from Ships Regulations, as amended for ships in UK ports, with regards to fuel changeover and “hotelling”. Find out more.

MGN 401 (M+F) Amendment 3 Navigation: Vessel Traffic Services (VTS) and Local Port Services (LPS) in the UK

The purpose of this guidance note is to assist Statutory Harbour Authorities in considering the implementation of a VTS or LPS and in reviewing an existing VTS. It will be used by the MCA, as competent authority for VTS. Find out more.

MGN 406 (M+F) Use of barbecues and pig roasts on ships and fishing vessels

This MGN alerts owners, operators, managers, seafarers and fishermen to the dangers associated with the use of barbecues and similar equipment on board vessels. Find out more.

MGN 406c (M+F) Use of barbecues and pig roasts on vessels

Guidance on the use of barbecues and pig roasts on ships and fishing vessels, corrects information from MGN 406. Find out more.

MGN 407 Testing fire protection for composite, wood constructions

Details the research undertaken and the procedures to be followed to demonstrate the fire protection standards for non-steel constructions. Find out more. 

MGN 411 Certification requirements for crew of fishing vessels, small commercial vessels and large yachts

Brings to fishermen’s attention training and certification requirements that currently apply to all UK registered commercial fishing vessels. Find out more. 

MGN 413 (F) Amendment 3 voluntary code of practice for employment of non European economic area (EEA) fishing crew

Advising of the voluntary code of practice, originally produced by the Scottish fishermen’s federation (SFF) in consultation with the fish industry safety group (FISG) – appendix A. Find out more. 

MGN 414 Fishing vessels: management beyond european waters

Guidance for owners and skippers when they are operating their vessel outside UK waters. Find out more. 

MGN 415 Fishing vessels: hazards trawling, including beam trawling and scallop dredging

Guidance on safe operation of fishing vessels engaged in trawling and twin beam trawling, including scallop dredging with derricks or booms. Find out more. 

MGN 416 (M) Amendment 1: Small commercial vessels operating in foreign waters

This notice provides guidance to all who have an interest in small commercial vessels including rescue boats with an intention to operate abroad in non-UK waters. Find out more. 

MGN 417 (M+F) Amendment 1 Radio communications GMDSS shore based maintenance

A self certification process for the registration of GMDSS shore-based maintainers. Find out more. 

MGN 418 Roll-on/roll-off ships stowage and securing of vehicles

Reminds industry of codes and standards which should be followed and includes key extracts from these documents for ease of reference. Find out more. 

MGN 424 (M) Safety responsibilities on board dive boats

Amendment 1 outlines advice and procedures for safe conduct of diving operations especially where diving operations are not controlled by the vessel owner. Find out more. 

MGN 426 External access to means of escape

Highlights conflict between safety and security with regards to means of escape and provides advice on the methods to overcome the conflict. Find out more. 

MGN 432 (M+F) Amendment 1: Safety during Transfers of Persons to and from Ships

This amendment provides guidance for all vessels engaged in transfers of persons at anchor or underway as regards. Find out more. 

MGN 434 (M+F) Amendment 2: Navigation: vessel traffic services (VTS) – training and certification of VTS personnel

Standards of VTS training and certification recognised by the United Kingdom Competent Authority. IALA standards and the UK National Occupational Standards. It also provides information on the procedures for the training and certification of VTS personnel in the UK. Find out more. 

MGN 435 Declaration of maximum continuous engine power

Maximum continuous engine power is the total power that can be obtained at the flywheel of each engine used to propel the vessel. Find out more. 

MGN 437 Small commercial vessel codes of practice revision

Revision of sections of the small commercial vessel code of practice. Find out more. 

MGN 438 CERS exemption arrangements under VTM reporting regulations 2004

Describes notification exemption arrangements where allowed under the MS (Vessel Traffic Monitoring and reporting requirements) regulations 2004. Find out more. 

MGN 439 Survey standards for 24m and over registered length FV

General guidance on the survey policy for 24m and over registered length fishing vessels. Find out more. 

MGN 440 (M) Amendment 1 Measures to counter piracy, armed robbery

Provides links to websites containing information countering piracy, armed robbery and other acts of violence against merchant shipping. Find out more. 

MGN 449 Excessive harmonic distortion: potential hazards

Alert to the possible problems caused by excessive harmonic distortion of electrical systems onboard vessels. Find out more. 

MGN 451 (M+F) The risk of exposure to radiation

Amendment 1 outlines details on how the exposure to radiation can take many forms and can cause varying degrees of harm. Find out more. 

MGN 452 Potential hazards of arc flash

A warning on the potential hazards of arc flash, and guidance on safety measures. Find out more. 

MGN 455 Support for maritime training scheme-revised arrangements

Revised arrangements of the government’s financial support scheme for merchant navy training, (SMarT), from 1 August 2012 to 31 March 2015. Find out more. 

MGN 457 Oil recovery vessel code alternate arrangements

Factors considered in the decision to withdraw the code and alternative arrangements. Find out more. 

MGN 464 Life and rescue boat weight increase from water ingress

Guidance on identifying and dealing with overweight lifeboats and rescue boats. Find out more. 

MGN 465 Annual testing of automatic identification systems (AIS)

Guidance on the requirements of ‘MSC.1/Circ.1252’ and carrying out tests on non-SOLAS ships with class ‘A’ automatic identification systems. Find out more. 

MGN 466 The rescue boat code

A code of practice that’s voluntary for boats which are less than 15 metres in length, and required for HMCG declared facilities. Find out more. 

MGN 468 – Amendment 1 (M) – Voluntary Towage Endorsement Scheme

Describing the arrangement for the voluntary towage endorsement scheme; outlining competence standards and necessary knowledge. Find out more. 

MGN 469 (M) Amendment 1: Safety standards for non-passenger vessels

Provides guidance for the safety requirements for non-passenger vessels operating only on UK inland waters. Find out more. 

MGN 470 (M) MLC 2006 list of merchant shipping notices and guidance notes

Amendment 2 lists merchant notices and marine guidance notes which provide standards or guidance for implementation of the maritime labour convention, 2006. Find out more!

MGN 471 (M) Amendment 2: Maritime Labour Convention, 2006, definitions

Information explaining the UK’s understanding of specific terms used in the Maritime Labour Convention, 2006, as amended. Find out more. 

MGN 472 (M) Amendment 4 MLC applying for a substantial equivalence

Information on the procedure for applying for a substantial equivalence on UK flagged vessels, which are subject to the MLC, 2006. Find out more. 

MGN 474 (M) Amendment 1 retention of crew agreements where appropriate

Requirements for crew agreements to be maintained on UK sea-going ships and yachts which are not subject to the MLC. Find out more.

MGN 475 (M) Amendment 1 MLC recruitment and placement

This notice provides information relating to recruitment and placement under the 2006 regulations. Find out more. 

MGN 476 (M) MLC 2006 advice signing on non-MLC ratified country’s ships

Amendment 2 outlines guidance for seafarers about their protection, rights and entitlements under the Maritime Labour Convention (MLC) 2006. Find out more. 

MGN 477 (M) amendment 5 MLC 2006 seafarer’s employment agreements

Every seafarer employed on a vessel to which the maritime labour convention (MLC) applies, must have a legally enforceable seafarers employment agreement (SEA). Find out more. 

MGN 478 (M) Maritime labour convention 2006 – seafarer’s wages

Amendment 1 provisions for continuation of a seafarer’s entitlements in relation to payment of wages, if held captive in the event of piracy or armed robbery. Find out more. 

MGN 479 (M) Maritime labour convention 2006 repatriation of seafarers

Amendment 1 outlines circumstances in which shipowners are required to repatriate seafarers under the MLC and guidance on the maximum period of sea service. Find out more.

MGN 480 Amendment 2 MLC 2006 Ship owners liabilities including seafarer compensation

Amendment 2 includes the 2014 Amendments to the MLC which came into force internationally in January 2017. Find out more. 

MGN 481 Amendment 1 Crew Accommodation and supplementary guidance

How owners and operators of UK registered ships comply with the requirements of Part 7 of the MS MLC, minimum requirements for seafarers, regulations 2014. Find out more.

MGN 482 (M) Amendment 1 maritime labour convention 2006, medical care

Shipowners requirements to provide seafarers with medical care on board ship. Find out more.

MGN 484 (M) Amendment 4: Health and safety published accident statistics – information and advice

Provides shipowners with links to information to maintain awareness of hazards and risks which are causing accidents to inform risk assessments and procedures. Find out more. 

MGN 485 (M) Amendment 1 MLC, 2006 -seafarer employment agreements application to trainees.

Information on the application of the requirement for a seafarer employment agreement to trainees engaged through an approved training provider on a UK ship. Find out more.

MGN 486(M+F) Amendment 3 access to shore based welfare facilities

This guidance outlines the arrangements in place in the UK for accessing shore based welfare facilities. Find out more.

MGN 487 (M) Amendment 2 Maritime Labour Convention (MLC), 2006 On-shore complaints

This note provides guidance to owners, operators and seafarers on the UK provisions on the MCA’s handling of complaints made to the MCA relating to the Maritime Labour Convention, 2006 (MLC). Find out more. 

MGN 492 (M+F) Protecting those not employed by the shipowner

Amendment 1 outlines information about the safety and duty of care for people on a vessel who are not employed by the ship owner. Find out more. 

MGN 495 Certificate of competency tug deck

Describes the system for officers and ratings to gain certificates for tugs working in near coastal areas and categorised waters. Find out more. 

MGN 496 Certificate of competency for master workboat deck

Information describing the system to gain certificates to master workboats less than 500 GT operating in the unlimited area. Find out more. 

MGN 497 Storage and use of dangerous goods onboard ship

Information about the correct storage and stowage of packaged quantities of dangerous goods. Find out more. 

MGN 498 (M) Amendment 1 Operational guidance for towing inflatables

A reminder of operational requirements in the Inland Waters Small Passenger Boat Code for towing vessels operating from a beach or harbour, encouraging the use of the same guidelines on inland lakes. Find out more. 

MGN 503 Amendment No.1 (F) Procedure for Carrying out Small Fishing Vessel Stability Tests

This MGN has been produced for owners and skippers of small fishing vessels as an aid to assess the stability of their vessels in accordance with MSN 1871 Amendment No.2 The Code of Practice for the Safety of Small Fishing Vessels of less than 15m Length Overall (The Code of Practice). Find out more. 

MGN 504 (M) Maritime Passenger Rights – role of the National Enforcement Body

The roles of the MCA, as Maritime Passenger Rights National Enforcement Body, and the voluntary UK Complaint Handling Bodies. Find out more. 

MGN 505 (M) Amendment 1: Human element guidance – Part 1: Fatigue and fitness

This MGN gives information on statutory duties under UK and international shipping legislation on the causes of fatigue and guidance on fatigue management good practice. Find out more. 

MGN 506 (M) Amendment 1 Navigation: Deep-sea pilotage in the north sea, english channel, and the skagerrak

Guidance on the regulations for deep-sea pilotage. This notice also includes contact details for the competent authorities covering the areas concerned. Find out more. 

MGN 508 (M) Oil pollution : liability and compulsory insurance

Revision to the limits of liability (1992 Civil Liability Convention) and note to maintain compulsory insurance against pollution damage. Find out more. 

MGN 510 (M+F) Use of exhaust gas cleaning systems.

Guidance for United Kingdom’s approach to the use of exhaust gas cleaning systems (EGCS), for the prevention of air pollution from ships. Find out more!

MGN 511 (M) – Solid Bulk Cargoes: Amendments 02-13 to (IMSBC)

Users of the code are advised to implement amendments, in particular sections 4 and 8, and note additional products added to Annex 1 (IMSBC). Find out more!

MGN 512 (M) – Solid bulk cargoes: Cargoes not listed in (IMSBC)

Details required by Competent Authorities for them to apply to IMO, for cargoes not listed, to be incorporated within appendix 1 of (IMSBC). Find out more. 

MGN 513 (M) – Solid Bulk Cargoes: Controlling moisture content

Guidelines by the IMO on the preparation, approval and implementation of procedures necessary for solid bulk cargoes which may liquefy. Find out more. 

MGN 516 (M) IMO Codes and guidelines for offshore vessels

For many ships operating offshore, the full extent contained within IMO regulations may be partially exempted and/or equivalent standards. Find out more. 

MGN 518 (M) Police Boat Codes, Amendment 3 (PBC3)

Amendment 3 provides a standard for the construction, machinery, carriage of equipment, manning, survey and certification of Police Boats. Find out more. 

MGN 519 (M) Life-saving appliances: Controlled means of descent

UK policy and procedure for acceptance of descent equipment intended to provide a controlled means of decent to reach survival craft. Find out more. 

MGN 524 (M+F) Amendment 1 – Life-saving appliances – category C medical kits

Companies procuring, storing, distributing or supplying Category C (either as stand alone kits or contained within packed survival craft). Find out more. 

MGN 526 – Stability guidance for fishing vessels – Wolfson method

Provides guidance to help fishermen make decisions regarding the operation of their vessel using the Wolfson Stability Guidance Method. Find out more. 

MGN 527(M) Tonnage of Multihulls Under 24m Load Line Length

Calculating the tonnage of multihull (under 24m) vessels in advance of the wider publication to Instructions to Surveyors. Find out more. 

MGN 529 (M + F) Life-saving appliances – immersion suits

MCA criteria for visual inspection of immersion suits stored in airtight packaging. Find out more.

MGN 530 (M+F) Radio log book: merchant and fishing vessels

Log Books are required to comply with Part II MS (Radio Installation) regs 1998 or Part III of MS (Radio) (Fishing Vessel) regs 1999. Find out more. 

MGN 531 (M) Cargo stowage and securing

The minimum requirements for existing containerships to comply with section 6 (Design) of Annex 14 of the CSS Code. Find out more. 

MGN 534 (M+F) Cargo Safety: Verifying gross mass of containers

The legal position in the UK with regards to the recent amendments to SOLAS VI which take effect from 1st July 2016. Find out more. 

MGN 535 (M) Amendment 1 Small Seagoing Passenger Ship code (SSPS)

This MGN re-introduces the Maritime and Coastguard Agency’s (MCA) SSPS code. Find out more. 

MGN 536 (M) Amendment 5 safety management code for domestic passenger ships

For guidance on how to comply with the audit and self-assessment requirements of safety management code for domestic passenger ships as set out in the amended MSN 1869(M). Find out more. 

MGN 540 Fitting ‘fall preventer devices’ to on-load release hooks

Applicable to davit launched lifeboats fitted with on-load release hooks, and any similar on-load release systems if fitted to rescue boats. Find out more. 

MGN 541 Replacement of lifeboat release and retrieval systems

Applicable to davit launched lifeboats fitted with on-load release hooks, and any similar on-load release systems if fitted to rescue boats. Find out more. 

MGN 542 (M) The Hovercraft Code

Introduces the Maritime and Coastguard Agency’s Hovercraft Code. Find out more. 

MGN 544 (M+F) Life-saving appliances – means of recovery

Life-saving appliances – means of recovery of persons from the water by ships and boats – plans, procedures and acceptance of recovery equipment. Find out more. 

MGN 545 Transportation of dangerous goods (marine)

Guidance on the transport of dangerous goods when carried in a private vehicle, or by a foot passenger on a Ro-Ro ship. Find out more. 

MGN 545 (M+F) Transport of dangerous goods in private vehicles

Guidance on the transport of items classified as dangerous by individuals in private vehicles and by foot passengers on Ro-Ro ships. Find out more. 

MGN 546 (M) Amendment 1: in-water surveys

Updated guidance on in water survey in lieu of dry docking for statutory bottom inspection for UK passenger and cargo vessels, including domestic vessels. Find out more. 

MGN 548 (M+F) Amendment 1 Life-Saving Appliances – servicing requirements for SOLAS inflatable life saving appliances at approved service stations

This note provides guidance on the MCA policy with regards to service requirements for SOLAS certificated inflatable Life-Saving Appliances. Find out more.

MGN 550 (M+F) Amendment 1: Electrical installations – guidance for safe design, installation and operation of lithium-ion batteries

This MGN provides best practice marine guidance to facilitate safe and environmentally friendly battery solutions for vessels utilising lithium-ion batteries. Find out more. 

MGN 552 Cargo – safe stowage of specialised vehicles

Notifying the shipping industry of the potential hazards when carrying specialised vehicles. Find out more. 

MGN 553 Amendment 1(M+F): Inflatable Non-SOLAS liferafts and life-saving appliances

MCA policy for acceptable standards of non-SOLAS inflatable life-saving appliances incorporating the changes in the rationalised ISO 9650-1-2022, and completion of phase out of ORC liferafts. Find out more.

MGN 554 (M+F) Amendment 2 – Procedure for becoming a UK approved body

This note sets out the procedure for conformity assessment bodies (CABs) to follow in seeking designation as a UK approved body under the merchant shipping (marine equipment) regulations 2025. Find out more. 

MGN 555 (M) Amendment 1 Life-saving appliances: lifeboats, rescue boats, launching appliances and release gear – authorisation of service providers

Notice to all shipowners, ship operators and managers, masters, officers and crew of merchant ships, authorised service personnel and recognised organisations. Find out more.

MGN 557 (M+F) Amendment 2 Marine equipment – market surveillance – strategy, reporting and enforcement

Information for those involved in the purchase and inspection of marine equipment, as well as action that should be taken if such equipment is suspected to be non-compliant. Find out more. 

MGN 558 (M) Amendment 1 Marine Evacuation Systems (MES) servicing and deployments

MCA interpretation for SOLAS Chapter III rotational deployments of MES, roles different parties should play and pass criteria for deployment. Find out more. 

MGN 560 (M) Amendment 2 life-saving appliances

This Marine Guidance Note (MGN) details the requirements for maintenance, thorough examination, operational testing, overhaul and repair of lifeboats, rescue boats, launching appliances and release gear for UK registered ships. Find out more. 

MGN 561 (M) Amendment 1 Surveys: recognised organisation enhanced authorisation

The conclusion of the phase-in period for the Enhanced Authorisation Scheme (EAS) and its implementation. Find out more. 

MGN 562 (M+F) Amendment 4 Radio: Radio regulations amendments and GMDSS radio equipment updates

Guidance on changes made in the ITU Radio Regulations affecting VHF communications and equipment. Find out more. 

MGN 563 (M+F) Amendment 2 Port waste reception facilities and management planning

Guidance on the implementation of Port Waste Reception Facilities for ships and harbours/ports/terminals. The purpose of revising this MGN is to reference new methods of payment for Port Waste Exemption applications. Find out more. 

MGN 564: marine casualty and marine incident reporting

Marine Guidance Note (MGN) 564 describes how marine casualties and marine incidents should be reported to MAIB. This notice replaces MGN 458. Find out more. 

MGN 567 Marine evacuation systems – single point of failure

Process to be applied by ship operators to demonstrate the assessment and mitigation of the risk of a single point of failure. Find out more

MGN 568 (M) Amendment 1 Surveys: alternative compliance safety system

Conditions for entering the alternative compliance safety system where safety equipment surveys are undertaken by UK authorised recognised organisations. Find out more. 

MGN 570 Amendment No. 1: (F) Fishing vessels: emergency drills

Guidance and procedures for carrying out emergency drills on board fishing vessels. Find out more. 

MGN 571 (F) Fishing vessels: prevention of man overboard

Notice to all owners, operators, managing agents, skippers and crew. Find out more. 

MGN 577 (M) Amendment 2 maintenance of lists of crew ashore

Obligations to maintain a list of crew, including all changes, at an address in the United Kingdom. Find out more.

MGN 579 (M) Load line convention regulations 2018

Guidance and clarification on the Merchant Shipping International Load Line Convention (Amendment) regulations 2018. Find out more.

MGN 580 (M) Amendment 1 – Fire protection – fire retardant treatments for fabrics

Outlines MCA Approval Procedures for fire retardant treatment of various items, covers and components onboard vessels certificated under the Large Commercial Yacht Code. Find out more. 

MGN 582 (F) Amendment 1 ILO work in fishing convention, 2007 – financial security

Fishing vessel owners must have insurance, or another form of financial security, to meet their liabilities and requirements under ILO 188. Find out more. 

MGN 583 (F) Amendment 2 ILO Work in fishing convention – fishermen’s work agreements

Fishermen working on a fishing vessel engaged in commercial operations, must have a fisherman’s work agreement (FWA), setting out their terms and conditions. Find out more. 

MGN 585 (F) Amendment 1 ILO work in fishing convention, payment of fishermen

The minimum standards to be met in paying fishermen for their work on fishing vessels whether fishermen are employed or work as self-employed share fishermen. Find out more. 

MGN 587 (F) Amendment 2 ILO health and safety responsibilities

Information on the responsibilities of fishing vessel owners, including managers, the skipper and fishermen, for health and safety on UK fishing vessels. Find out more. 

MGN 588 (F) Amendment 2: Compulsory provision and wearing of personal flotation devices on fishing vessels

This Notice provides information on assessing and mitigating risks when writing a risk assessment for the wearing of Personal Flotation Devices. Find out more. 

MGN 589 (F) Amendment 1 ILO Work in fishing convention: complaints

Details on the UK provisions on the MCA’s handling of complaints, made to the MCA, relating to the work in fishing convention 2007 (ILO 188). Find out more. 

MGN 595 ILO work in fishing convention food and water

Practical advice on the provision of food and water for all fishing vessels. Find out more. 

MGN 596 – Fishing safety: Helping to improve safety – Fishing Vessels

In 2018, ILO Convention No. 188 The Work in Fishing Convention will also be implemented in the UK. Find out more. 

MGN 597 (M) Intended pleasure vessels – Temporary commercial use at sea – Business purposes

This MGN should be read in conjunction with Part 1 of the IPV Code. Find out more. 

MGN 598 (M) Intended pleasure vessels – Temporary commercial use at sea – Race support boats

This MGN should be read in conjunction with Part 2 of the IPV Code. Find out more. 

MGN 599 (M) Amendment 1 Pleasure vessels – regulations and exemptions – guidance and best practice advice

This MGN provides guidance and best practice advice for pleasure vessels, and general exemptions for Class XII vessels. Find out more.

MGN 600 (M) Amendment 3 Maritime Labour Convention – Inspection of coded vessels

Amendment 3 provides guidance on the arrangements in place for inspection for Maritime Labour Convention compliance. Find out more.

MGN 601 (M) Amendment 1 MLC, 2006 crew accommodation for small vessels of less than 200GT

Crew accommodation standards as a substantial equivalence to MLC standard A3.1 for new UK vessels under 200GT, ordinarily engaged in commercial activities. Find out more.

MGN 602 (M) Amendment 1 MLC substantial equivalence for crew accommodation for 200GT to <500GT

Substantially equivalent accommodation standards agreed by UK tripartite working group for new vessels of 200GT to less than 500GT. Find out more. 

MGN 603(M) Requirements for Oil or Oily Mixture Discharges for Offshore Installations Engaged in Oil and Gas Operations on the UK Continental Shelf

The purpose of this MGN is to provide further information with respect to the requirements for oil or oily mixture discharges for offshore installations engaged in oil and gas operations on the Continental Shelf. Find out more.

MGN 604(M+F) – Media, Other Organisations or persons carried as passengers on board Ships and Fishing Vessels.

This notice should be read with MGN 538, MGN 571, MGN 587 and MGN 588 and replaces MGN 494. Find out more. 

MGN 608 Amendment 1 (M+F) Radio Survey Service: Authorisation

Procedures for persons wishing to obtain authorisation to carry out radio surveys are explained. Find out more. 

MGN 609 (M) Class IX tugs under 500GT – guidance for exemption from the carriage of a rescue boat

This notice sets out the factors that the MCA (on behalf of the Secretary of State) will take into account when considering whether to grant an application for such an exemption. Find out more. 

MGN 610 (M+F) Amendment 1 SOLAS chapter V – guidance on the merchant shipping (safety of navigation) regulations 2020

Clarification and guidance on the safety of navigation regulations 2020 which implement chapter V of SOLAS in its most recently amended form into UK law. Find out more. 

MGN 611 (M) Damage stability: alternative verification method for tankers

This notice clarifies areas of responsibility and UK procedures when applying the 2014 amendments to MARPOL Annex 1 chapter 1 regulation 3(6) and chapter 4 regulation 28(6) concerning the fitting of stability instruments on board oil tankers and the consequent amendments to the IOPP Certificate in APPENDIX II (Form B). Find out more. 

MGN 612 (M) Yacht and powerboat safety at sea – maintenance, modifications, damage and repairs – good practice

Notice to all owners, managing agents, skippers, designers, builders, surveyors, crew and certifying authorities of yachts and powerboats including pleasure vessels and small commercial vessels. Find out more. 

MGN 613 (M) Yacht and powerboat safety at sea – grounding of fixed fin keel GRP yachts – good practice

Notice to all owners, managing agents, skippers, designers, builders, surveyors, crew and certifying authorities of yachts and powerboats including pleasure vessels and small commercial vessels. Find out more. 

MGN 614 (M) Yacht and powerboat safety at sea – stowage of life-saving appliances – good practice

Notice to all owners, managing agents, skippers, designers, builders, surveyors, crew and certifying authorities of yachts and powerboats including pleasure vessels and small commercial vessels. Find out more. 

MGN 615 (M) Yacht and powerboat safety at sea – preparedness for non-coastal passages – good practice

Notice to all designers, builders, surveyors, owners, managing agents, skippers, crew and certifying authorities of yachts and powerboats including pleasure vessels and small commercial vessels. Find out more.

MGN 616 (M) Yacht and powerboat safety at sea – rigs and rigging – good practice for inspection

Notice to all designers, builders, surveyors, owners, managing agents, skippers, crew and Certifying Authorities of yachts and powerboats including pleasure vessels and small commercial vessels. Find out more. 

MGN 617 (M) Yacht and powerboat safety at sea – emergency procedures, equipment and actions – good practice

Notice to all designers, builders, surveyors, owners, managing agents, skippers, crew and Certifying Authorities of yachts and powerboats including pleasure vessels and small commercial vessels. Find out more. 

MGN 618 (M) Large commercial yachts – guidance for the control and operation of lifting gear

Notice to ship owners, operators and managers, masters, officers and crew, authorised service providers, lifeboat equipment manufacturers and UK authorised recognised organisations. Find out more. 

MGN 619 (F) Amendment 2: The application of the LOLER and PUWER Regulations 2006 to fishing vessels

Amendment 2 is intended to provide guidance to fishing vessel owners, employers, skippers and share fishermen on the application of the LOLER and PUWER regulations 2006. Find out more. 

MGN 620 ILO work in fishing recruitment and placement of fishermen

Requirements where recruitment and placement services are used to engage crew. It is the fishing vessel owner’s responsibility to use only reputable (RPSs). Find out more. 

MGN 621 roll-on/roll-off ships – guidance for the stowage and securing of vehicles

This MGN annexes a revision of the Code of Practice ‘Roll-on/Roll-off Ships – Stowage and Securing of Vehicles’. Find out more. 

MGN 622 (M) Seagoing DPV <24m vessels – General exemption

MCA Exemption for Seagoing Domestic Passenger Vessels of less than 24m in length complying to EU Directive 2009/45/EC, and allows alternative application of safety standards as of the 21st December 2019. Find out more. 

MGN 623 (M+F) Telemedical advice service (TMAS) for ships at sea

How to obtain telemedical advice (previously radio medical advice) when a medical incident or medical emergency arises at sea. Find out more. 

MGN 624 (M+F) Carcinogens and mutagens regulations 2007

Amendment 2 outlines information for the protection of those working on board ships from the risks related to exposure to carcinogens and mutagens. Find out more. 

MGN 627(M) Amendment 2 – Guidance on changes and available exemptions against requirements introduced by the Merchant Shipping (Safety Standards for Passenger Ships on Domestic Voyages) (Miscellaneous amendments) Regulations 2022

Clarifies requirements introduced by the Regulations, colloquially known as the “Grandfather rights” Regulations. Amendment 2 clarifies some requirements in section 2. Find out more. 

MGN 628 (M+F) Amendment 1: Construction and outfit standards for fishing vessels of less than 15m length overall

Below are the construction standards for new fishing vessels less than 15m length overall which apply to new builds from 21 July 2020. Also contained in the page are marine information notes containing additional information relating to these standards. Find out more.

MGN 629 (M+F) Construction and outfit standards for fishing vessels of 15m to 24m

Below are the construction standards for new fishing vessels 15m length overall to 24m registered length. Also contained in the page are marine information notes containing additional information relating to these standards. Find out more. 

MGN 630 Amendment 4 (F) Fishing vessels: Pre-registration surveys for fishing vessels

Note gives guidance on Pre-registration Survey process for fishing vessels. Find out more. 

MGN 631 (M+F) Amendment 1: The merchant shipping (prevention of pollution by sewage from ships) regulations 2020

An explanation of the UK shipping regulations relating to the prevention of pollution from sewage. Includes information on equipment requirements and exemptions for unmanned non-self-propelled barges. Find out more. 

MGN 632 (M+F) Amendment 2: The merchant shipping (prevention of pollution by garbage from ships) regulations 2020

This MGN provides guidance and clarification for aspects of MARPOL Annex V, polar code and merchant shipping (prevention of pollution by garbage from ships) regulations 2020 (S.I. 2020/621). Find out more. 

MGN 633 (M+F) Amendment 1: Ship recycling requirements in relation to hazardous materials on ships

This marine guidance note provides guidance and clarification on certain aspects of both the EU Regulation and the UK Ship Recycling Regulations. Find out more. 

MGN 634 (M+F) Navigation: Long-range identification and tracking – survey, certification and compliance

This notice gives guidance as per International Maritime Organisation (IMO) circulars MSC.1/Circ.1295, 1298, 1307 and 1338 regarding the survey, certification and compliance of ships that are required to transmit long-range identification and tracking (LRIT) information. Find out more. 

MGN 635 (M): Inspections of Ro-Ro passenger ships and high-speed passenger craft

This MGN draws attention to and provides clarification on the inspection regime applicable to RoRo and high speed passenger craft operating a regular service out of a UK port. Find out more. 

MGN 637 (M) Amendment 1 – International code for ships operating in polar waters (Polar Code)

Updated guidance on the above regulations following amendments by the IMO to the requirements regarding new vessel types added to some of the requirement. Find out more. 

MGN 638 (M+F) Amendment 1: Human element guidance – part 3 distraction

Guidance to mariners on the use of mobile phones or other personal electronic devices and the dangers of not using them appropriately when working. Find out more. 

MGN 641 Amendment 1 (M) Guidance on radiocommunications under chapter IV of SOLAS

Clarifying aspects of SOLAS Chapter IV requirements that need further explanation. Find out more. 

MGN 642 (M) Safety rules and standards for seagoing domestic passenger ships: 2016 and 2017 amendments

Guidance on the latest EU safety rules and standards for seagoing domestic passenger ships and High Speed Craft (HSC) operating within the EU, and their implementation under UK law. Find out more. 

MGN 643 (M) Emergency information and arrangements for passengers on passenger ships

Describes the Master’s responsibilities in relation to emergency information and arrangements on Classes III to VI(A) passenger ships and directs the reader to relevant legislation. Find out more. 

MGN 644 (M) Interpretation on positive freeboard and decked or open vessel

Notice to all builders, designers, surveyors, operators and skippers of UK under 15m fishing vessels and small commercial vessels and workboats. Find out more. 

MGN 645 (M) Load line length – policy clarification: hull form cut-outs, extensions and steps

This note clarifies UK interpretations for determining load line length on vessel hull forms which feature cut-outs, removable end sections and stepped or recessed decks. Find out more. 

MGN 646 (M+F) Engine emission standards applicable to inland waterway vessels

This Marine Guidance Note provides clarification concerning the applicable engine standards for vessels operating on inland waterways. Find out more. 

MGN 647 (M+F) Alternative to the IMO MARPOL Annex VI tier III standard engine

Guidance concerning the choice of an alternative engine in the event the owner or operator is not able to purchase an IMO MARPOL Annex VI tier III standard engine. Find out more. 

MGN 649 (M) Amendment 1 Application of MARPOL Annex II to offshore support vessels

This notice replaces MGN 649 (M). Find out more. 

MGN 651 (M) Bilge alarms on cargo ships 24m or more in length and under 500GT

This MGN explains the new legal requirement for cargo ships that are 24m or more in length and less than 500GT to be fitted with bilge water level detectors and alarms. Find out more. 

MGN 652 (M+F) infectious disease at sea

Amendment 1provides information on the cause and prevention of infectious disease at sea. Find out more. 

MGN 653 (M) Amendment 1 electric vehicles onboard passenger roll-on/roll-off (ro-ro) ferries

This Marine Guidance Note provides the UK shipping industry with best practice guidance to facilitate safe carriage, and potential charging of, electric vehicles onboard roll-on roll-off (ro-ro) passenger ferries. The MCA has developed this guidance in conjunction with, and at the request of industry. Find out more.

MGN 654 (M+F) Offshore Renewable Energy Installations (OREI) safety response

Highlights issues to consider when assessing navigational safety and emergency response, caused by OREI. Find out more. 

MGN 656 (M+F) The United Kingdom list of approved ship recycling facilities

The purpose of this MGN is to publish the UK list of approved ship recycling facilities as required by the UK ship recycling regulations and referred to in Section 6 of MGN 633 Amendment 1. Find out more. 

Annex to MGN 656 The latest UK list of approved facilities

This document forms the Annex to MGN 656 which sets out the UK’s approved ship recycling facilities. Find out more. 

MGN 657 (M+F) Amendment 1 requirements for fixed aerosol fire extinguishing systems for use in small vessel machinery spaces

Maritime and Coastguard Agency installation and testing requirements for new Fixed Aerosol Fire Extinguishing Systems & UK Approved Bodies permitted to approve such testing. Find out more.

MGN 658 (M+F) Control of noise at work regulations 2007

Requirements for the protection of seafarers, fishermen and workers from the risks related to exposure to noise at work. Find out more.

MGN 660 (M) Special measures to enhance maritime safety for merchant ships

This notice provides guidelines for the Merchant Shipping (Special Measures to Enhance Maritime Safety) Regulations 2024. It covers the process for obtaining ship, Company and Registered Owner IMO numbers and explains the application procedure for a CSR. Find out more. 

MGN 661 (M+F) Navigation – safe and responsible anchoring and fishing practices

This note highlights the importance of full awareness of the submarine pipelines and cables on the seabed, prior and during anchoring operations, and during fishing activities. Find out more. 

MGN 662 (M) United Kingdom monitoring, reporting and verification (UK MRV) regime

This guidance sets out the templates and technical rules for the submission of monitoring plans, emissions reports and documents of compliance. Find out more. 

MGN 663 (F) Enclosed space entry on fishing vessels

This note provides guidance on compliance with The Merchant Shipping and Fishing Vessels (Entry into Enclosed Spaces) Regulations 2022, which apply to fishing vessels from 14 May 2023. Find out more. 

MGN 664 (M+F) Amendment 1: Certification process for vessels using innovative technology

Updated guidance on how to process an application for the certification of UK vessels wherever they may be, or other vessels operating in UK waters that use Innovative Technology or where a risk-based approach is used. Find out more. 

MGN 665 (M+F) Registration of EPIRBs and 406 MHz PLBs used in the maritime environment

The UK Beacon Registry has created an online portal for registration of EPIRBs and 406 MHz PLBs which is now live and very user friendly. Offline registration is still available. Find out more. 

MGN 666 (M) Guidance for Merchant Shipping Notice (MSN) 1900 (M)

This MGN provides guidance on the construction requirements in MSN 1900. Find out more. 

MGN 667 (M) Guidance for MSN 1901 and MSN 1902

This MGN provides guidance on MSN 1902 and MSN 1903. Find out more. 

MGN 668 (M) Amendment 1: Additional safety measures for bulk carriers

This Marine Guidance Note explains the Merchant Shipping (Additional Safety Measures for Bulk Carriers) Regulations 2022. Find out more. 

MGN 670 (M) Amendment 1 Ships built on or after 1st January 2009 and engaged on international voyages – guidance on SOLAS chapter II-1

Updated guidance on the above regulations following amendments by the IMO to the requirements regarding Lifting appliances that have been introduced via ambulatory reference. Find out more.

MGN 671 (M) Subdivision and damage stability of cargo ships of 80m in length and over

This Note provides advice about the subdivision and damage stability requirements for cargo ships using the probabilistic method, the categories of ship to which those requirements apply and the formulae to be used for calculating the subdivision indices. Find out more.

MGN 672 (M) Extended dry-docking

Extended dry-docking allows vessels to be inspected out of the water at 7.5 years intervals, rather than 2 inspections in 5 years (no more than 36-month intervals), subject to eligibility. Find out more. 

MGN 673 (M+F): Radio communications: non-SOLAS vessel

This MGN draws attention to procedures and minimum levels of service for the testing and maintenance of EPIRBs; automatically including the ship’s position in distress alerts; and, supplying radio installations from an emergency source of power. Find out more. 

MGN 675 (M+F) Amendment 1 The merchant shipping (control and management of ships’ ballast water and sediments) Regulations 2022.

This MGN provides guidance on certain aspects of the merchant shipping (control and management of ships’ ballast water and sediments) regulations 2022 (SI 2022/737). Find out more. 

MGN 676 (M) Unmanned non-self-propelled barges – MARPOL Annexes I and IV Exemptions

This MGN provides guidance on the criteria for exempting unmanned non-self-propelled barges from some MARPOL Annex I and IV survey and certification requirements and how to apply. Find out more. 

MGN 677 (M) Guidance on the Merchant Shipping (High Speed Craft) Regulations 2022 (SI 2022/1219)

This Marine Guidance Note provides guidance to clarify the application of certain requirements in Chapter X of the Annex to the International Convention for the Safety of Life at Sea, 1974 (SOLAS), including the High Speed Craft (HSC) Codes, 1994 and 2000. Find out more. 

MGN 679 Nuclear Ships

Guidance on the application of the Merchant Shipping (Nuclear Ships) Regulations 2022 (SI 2022/1169), which regulate UK commercial nuclear-powered ships and foreign commercial nuclear-powered ships visiting UK waters. Find out more. 

MGN 680 (M+F) Amendment 1 – Procedure for becoming a UK Nominated Body

This Note sets out the procedure for Conformity Assessment Bodies to follow in seeking designation as a UK Nominated Body under the Merchant Shipping (Marine Equipment) Regulations 2025. Find out more. 

MGN 681 (M) Amendment 1 Fire safety and storage of small electric powered craft on yachts

The guidance contained in this MGN is intended to outline best practices related to design, equipment and outfit of dedicated spaces onboard, and to increase safety for handling, charging and stowage of Li-ion batteries and craft with these in-built. Find out more.

MGN 683 (M+F) IMO carbon reduction measures

Overview of technical and operational measures to reduce GHG emissions from ships introduced through amendments to Annex VI of the MARPOL Convention. Find out more. 

MGN 684 (M) Safety of powered watercraft

This MGN explains the dangerous use provisions of the MSA to powered watercraft, the obligations and offences for different actors, and the role of the MCA as the main statutory authority for enforcement. Find out more. 

MGN 685 (M+F) Issue of discharge books to seafarers

This notice outlines information on the regulations, policies and procedures for the issue of discharge books. Find out more. 

MGN 686 (M+F) eligibility for british seaman’s card

Guidance on the purpose of a British Seaman’s Card, who is eligible to be issued with one, and how to apply. Eligibility has recently been extended to fishermen. This is interim guidance pending public consultation on eligibility for seafarer documents. Find out more. 

MGN 689 (M): Amendments to international conventions and mandatory instruments – requirements for watertight doors on cargo ships

This MGN provides guidance on the harmonization of existing requirements for watertight doors in cargo ships in the 1988 Load Line Protocol, MARPOL, IGC Code and IBC Code with those in SOLAS. Find out more. 

MGN 690 (M+F) Approval and acceptance of electronic record books and recording requirements under SOLAS chapter V/Reg 28

MGN provides guidance on use of Electronic Record Books for the purpose of recording Navigational Activities as stipulated within SOLAS Chapter V/Reg 28 and IMO Resolution A.916(22). Find out more. 

MGN 691 (M) Navigation and radar training requirements for workboat code 3

This MGN details new requirements for navigation and radar training for masters and crew working on workboats and/or pilot boats certificated under Workboat Code Edition 3. Find out more.

MGN 692 (M) Revised notes to the SOLAS Chapter II-1 subdivision and damage stability regulations

This Note provides the consolidated text of the revised explanatory notes to the SOLAS Chapter II-1 subdivision and damage stability regulations as set out in MSC.429(98)/Rev.2. Find out more. 

MGN 693 (M+F) Amendments to SOLAS chapter II-1 (IGF code)

Amendments to the IGF Code which take effect from 1 January 2024 include, general editorial amendments and changes for ships constructed on or after 1st January 2024. Find out more. 

MGN 696 (M+F) Navigation Safety: Dynamically positioned vessels undertaking diving or other subsea operations

To give advice to both DP vessels undertaking diving or other subsea operations and vessels that are operating in the vicinity, when applying the provisions within COLREG. Find out more. 

MGN 698 (M): The carriage of military and commercial explosives

Guidance for carrying military explosives, stating when a Government Authorised Explosives Representative is required, supplements the International Maritime Dangerous Goods Code. Find out more. 

MGN 699 (M): Guidance on the merchant shipping (carriage of cargoes) regulations 2024

Provides guidance on the application of SOLAS Chapter VI in the UK and on UK ships, to be read alongside the Merchant Shipping (Carriage of Cargoes) Regulations 2024. Find out more. 

MGN 700 (M) Carriage of cargoes: guidance on the safe use of pesticides in ships

Guidance on the safe use of pesticides in ships, including solid bulk cargoes and cargo transport units. This Guidance links to the relevant UK Regulations and current IMO guidance. Find out more. 

MGN 701 (M) – Application of the industrial personnel code and the special purpose ships code

Updated guidance on the above regulations following the implementation of new SOLAS Chapter XV and the mandatory application of the SPS Code 1983 and 2008. Find out more. 

MGN 702 (M) Amendment 2 Maritime autonomous surface ships of less than 2.5 metres in LOA

The General Exemption for Maritime Autonomous Surface Ships (MASS) of Less than 2.5 metres in length overall ensures that eligible vessels have an available proportional pathway to enable operation. Find out more. 

MGN 703: Information concerning the training and competence of Remote Operators working with Remotely Operated Unmanned Vessels (ROUVs), certified under the Workboat Code Edition 3

Notice to all designers, builders, owners, operators, employers, certifying authorities Masters and Remote Operators, working with ROUVs. This information is provided for use by persons operating ROUVs, certified under The Workboat Code Edition 3. This notice should be read in conjunction with The Workboat Code Edition 3. Find out more. 

MGN 704 (M+F) Prevention of oil pollution: prohibition on the use and carriage for use of heavy fuel oil in arctic waters

Heavy Fuel Oil (HFO) – amendment to MARPOL Annex I to implement regulation 43A Special Requirements for the Use and Carriage of Oils as Fuel in Arctic Waters. Find out more. 

MGN 705 (M) Amendment 1 Remotely operated unmanned vessels (ROUVs) of 2.5 metres to less than 4.5 metres in length overall

This Marine Guidance Notice (MGN) explains a General Exemption which has been issued for Remotely Operated Unmanned Vessels of 2.5 to <4.5 metres in length overall. Find out more. 

MGN 709 Recommendations for ‘Short range’ yachts, when making passages greater than 90 miles from a safe haven

Provides additional recommendations and considerations for short range yachts operating outside short range limits. Find out more. 

MGN 710 (M) safety management systems for small workboats and pilot boats

Guidance on proportionate SMS requirements under Workboat Code Edition 3, including self-assessment, implementation evidence and the CA’s assurance role. Find out more. 

MGN 712 (M) Electronic inclinometers for new container ships and bulk carriers

This notice sets out new requirement mandating the carriage of electronic inclinometers on new container ships and bulk carriers of 3,000 gross tonnage and above from 1 January 2026. Find out more. 

MGN 713 (M) Fire protection regulations – adoptions of amendments in IMO resolutions in force on 1 Jan 2026

This Marine Guidance Note (MGN) advises of the adoption of IMO resolutions MSC.520(106), MSC.532(107), MSC.550(108), and MSC.555(108) and their entry into SOLAS Chapter II-2 and the Merchant Shipping (Fire Protection) Regulations 2023. Find out more.

MGN 714 (M+F) – adoption of amendments to the life saving appliances (LSA) Code.

The purpose of this Marine Guidance Note (MGN) is to advise of amendments to the Life Saving Appliance (LSA) Code and application date. Find out more.