Lifecord – a kill cord you will never forget – launched by Landau
Lifecord is a newly designed kill cord providing the certainty and reliability of a tethered connection between a boat’s engine ignition kill switch and pilot, ensuring the vessel’s engine stops should the pilot be inadvertently thrown from the helm. However, unlike the typical passive kill cords commonly seen, Lifecord is a ‘smart’ kill cord incorporating detection technology designed to trigger an audible and visual warning alarm should Lifecord be connected to the boat’s kill switch but not the pilot, similar to the seat belt warning in your car.
Delegates participating in the IIMS 5th biennial UAE branch conference
November. Now where did that go? Ah yes I remember – it vanished in something of a whirl. From one training event and seminar to another. Hugely rewarding for me personally though I have to say and I was delighted to meet so many members, both at the UK events and at the UAE Branch Conference over the course of the month. I have learnt a great deal, which for a highly non-technical person such as me is probably a dangerous thing! However, it occurred to me that if I did, then so did our members too. Certainly the positive feedback would suggest that to be the case.
An electric launch by Scruffie Marine takes to the water
Feature written by Derek Ellard of Scruffie Marine
Electric boats operate at a fraction of the cost of conventional fossil-fuel powered boats. They offer maximum torque through the whole rev range and ride in silence with no emissions. This means that marinas and waterways will be cleaner and quieter. No noise and no fumes from conventional engines to contend with. Are electric boats the thing of the future? Derek Ellard of Scruffie Marine, based in North Tamborine, Queensland, Australia thinks so and is involved in building them.
The recently formed IIMS Large Yacht & Small Craft Working Group is pleased to announce another training event and has been fortunate to secure an opportunity to visit the Dutch superyacht builder, Royal Huisman yard at Vollenhove in the Netherlands.
Royal Huisman has built some of the most iconic, striking and stylish craft to set to sea in recent years. They boast a facility of 30,000 square metres, which houses the modern equipment and infrastructure required for large custom yacht building and refitting. This state-of-the-art facility, set in Holland’s internationally renowned concentration of specialist maritime businesses, includes many advanced design and engineering software programmes for rapid communication with clients and the design team on systems design, engineering and construction processes. Naval architects and designers have access to the people with the experience, expertise and specialist skills that will enable them to realise their vision in the most intricate detail. IIMS has been granted permission to bring a group to the facility and this is a unique opportunity to have a look into their exciting and dynamic world at close quarters.
With effect from 1 January 2017, IIMS has announced that its SCWG (Small Craft Working Group) will become known as LYSCWG (Large Yacht & Small Craft Working Group).
IIMS Chairman of Yacht & Small Craft, John Excell, who was behind the decision to rebrand, explained, “There has been a significant shift in the market place with the continuing and exciting developments in the superyacht industry. A number of IIMS members who worked in the sub 24 metre vessels sector have progressed into the area of superyacht surveying, or are interested to do so. It is therefore entirely logical that we Continue reading “IIMS set to rebrand its SCWG as LYSCWG”
Over 30 yacht and small craft surveyors converged on Boathouse No.4 at the iconic Portsmouth Historic Dockyard for the 2016 ‘super’ training day on Monday 24 October and were joined by half a dozen more who came to the event remotely using video conferencing.
Chairman of yacht and small craft surveying, John Excell, welcomed guests to the day and particularly thanked Cygnus Instruments Ltd and Matrix Insurance Ltd for their generous sponsorship support of the day.
On Wednesday 25 May, a group of nearly 30 IIMS members met at the impressive Royal National Lifeboat Institution (RNLI) headquarters and training facility at Poole in Dorset, UK. Their mission? Firstly to have a close look first hand at the RNLI All-weather Lifeboat Centre and the various workshops to see and understand the activities going on. Then after lunch, the group combined with the surveyors at their conference for an invaluable afternoon of training and knowledge sharing.
Understanding engine crankshaft deflection measurement will aid a diagnostic engineer
At some time in his career the Diagnostic Engineer may well have to examine the running of a compression ignition engine. Many of the defects that occur on such units are down to wear in the main bearings causing the crankshaft to change its longitudinal straightness. Usually the first diagnostic test on such an engine is to take a series of measurements between the crank webs at various points round the circle of rotation called somewhat in correctly crankshaft deflections. If a driving engine is of the compression ignition type with a cylinder bore above about 250 mm (10 inches), it is also necessary to consider the alignment of its crankshaft. Below that size, the overall stiffness and small size of the unit and the fact that the crankshaft itself is an integral forging make the measurement of crankshaft deflections both extremely difficult and unnecessary.
When lightning strikes, and it does, having a lightning protection system can save your life
We were lucky when we were struck by lightning on our small 35’ GRP cruising sailing boat in Turkey in 2013, but without an LPS. All the plastic and some of the metal gear at the top of the mast exploded (see photo below) and simultaneously the headlining in the saloon exploded downwards with a loud bang. So much smoke that we initially thought we were on fire; but my wife and I survived unscathed to tell the tale. This inspired this article as we need to think about new a approach to a modern sailboat lightning protection system.
The most likely discharge exit was through the propeller shaft, but practically all electronics were violently destroyed and, as an electrical and electronic engineer, my assessment for our insurance claim afterwards showed that most devices had experienced severe arcing with small electronic components having exploded internally (see photo below).
Feature article written by Eur. Ing. Jeffrey Casciani-Wood HonFIIMS
As the propeller turns it absorbs the torque developed by the engine at given revolutions i.e., the delivered horsepower – and converts that to the thrust which, in turn, pushes the vessel through the water. According to Bernoulli’s law the passage of a hydrofoil (propeller blade section) through the water causes a positive pressure on the face of the blade and a negative pressure on its back. It is the resolution of the pressures that results in the torque requirement and the thrust development of the propeller. The negative pressure causes any gas in solution in the water to evolve into bubbles similar to those found when opening a bottle of lemonade or champagne. These bubbles collapse and can cause hammer like impact loads on the blades often in excess of 7 kg/cm2. It is the collapse of these bubbles that results in the observed damage to the propeller blade surfaces.
The ratio of the absorbed power or the delivered thrust to the total blade area of the propeller is called, respectively, the power and the thrust loading. If either of these exceeds a certain value which depends upon a complex relationship between the propeller type, the flow in which it works and its mean depth below the water relative to its diameter then the flow pattern of the water over the propeller blades breaks down causing a severe loss of thrust and, eventually, physical damage to the surface of the propeller blades and, also, the rudder and local steelwork of the vessel’s hull. That flow breakdown is called cavitation and is strictly analogous to the water hammer often heard in old plumbing systems. Cavitation is a highly complex phenomenon and the pitting damage it causes usually – but not necessarily – appears on the back of the blade following a clear radial pattern. It can also appear as similar damage on the driving face of the propeller in which case, almost certainly, a further factor has entered the problem in the form of an incorrect pitch distribution along the length of the blade. Most small craft propellers are usually of constant pitch over the blade length and that regime is accurate enough for 99% of boats but on high speed boats with large propeller loading factors the pitch should vary over the length of the blade i.e., the boat should be fitted with a varying pitch propeller. The effects of cavitation including loss of speed and damage to the propeller blades can be minimised by ensuring that the propeller has sufficient blade area relative to the area of the circle described by the propeller blade tips.
Nick Wilcox, Senior Associate and Albert Levy, Partner, both of Ince & Co LLP, Partner, debate the vagaries and confusion surrounding one aspect of the MLC 2006.
What’s the issue?
The Maritime Labour Convention 2006 (MLC 2006) has been in force internationally since August 2013 and, in that time, it has become clear that it has received widespread ratification, that enforcement is a reality, and that ships run the risk of detention if they are not compliant. However, there has also been a good deal of confusion over the question of “who is the ‘shipowner’?” under the MLC. The answer to the question is important, since it is that person who has the principal burden of ensuring MLC 2006 compliance.
In the Maritime Labour Convention, the “shipowner” is defined to mean the owner of the ship or another organisation or person who has assumed responsibility for the operation of the ship from the owner and who in doing so has agreed to take over the duties and responsibilities imposed on shipowners under the MLC 2006. This is the case even if another organisation carries out some of the duties of “shipowner” on its behalf. Therefore, the owner and the “shipowner” may well be different persons or organisations. Note that “shipowner” does not necessarily mean the owner of the ship in the proprietary sense.
Readers could easily be forgiven for being confused by the terminology. Lewis Carroll put it well in Through the Looking Glass: “When I use a word,’ Humpty Dumpty said in rather a scornful tone, ‘it means just what I choose it to mean – neither more nor less.’ Are you a “shipowner” under your charter party? ‘The question is,’ said Alice, ‘whether you can make words mean so many things.’ ‘The question is,’ said Humpty Dumpty, ‘which is to be master – that’s all.” Continue reading “MLC 2006: Are you a “shipowner” under your charterparty?”
The IIMS Small Craft Working Group met at Grafham Water in early May for its regular meeting at Grafham Water Sailing Club in Huntingdon.
The theme of the day was Metals in the Marine Environment. Although attendance was smaller than normal, those who did come to the meeting found the day both absorbing and highly informative too.
Three speakers spoke in detail and at length about their specialist subjects.
The Speakers
Carol Powell has been a consultant metallurgist to the Copper Development Association and Nickel Institute in the UK for over 20 years with particular specialisation in marine applications for copper-nickels, stainless steels and high nickel alloys. Furthermore, she has been a member of the Marine Corrosion Forum and Copper-Nickel Task Force since their inception and is currently deputy chair of the European Federation of Corrosion Marine Working Party.
