Loss of towline shackle pin led to tugboat Mangilao sinking reveals NTSB accident report

Tugboat Mangilao (Photo: Cabras Marine Corporation / NTSB)
Tugboat Mangilao (Photo: Cabras Marine Corporation / NTSB)

The loss of a towline shackle pin and deteriorated watertight fittings caused tugboat Mangilao to sink in the Pacific Ocean about 800 miles northwest of Guam, the National Transportation Safety Board (NTSB) has revealed in a Marine Accident Brief.

The 114 foot US flagged tugboat Mangilao sank on August 5, 2019 while being towed to a drydock in Subic Bay, Philippines by the 97 foot US flagged tug Chamorro. Both vessels were owned and operated by Cabras Marine Corporation. No one was aboard tugboat Mangilao and there were 10 crew members aboard the Chamorro.

No pollution nor injuries were reported in connection with the sinking. The 1982-built tugboat Mangilao, which was estimated to be worth Continue reading “Loss of towline shackle pin led to tugboat Mangilao sinking reveals NTSB accident report”

NTSB accident report concludes that incomplete safety procedures led to barge explosion

NTSB: incomplete safety procedures led to barge explosion
NTSB: incomplete safety procedures led to barge explosion

The National Transportation Safety Board (NTSB) has published Marine Accident Report 20-34 detailing the findings of its investigation involving the explosion of a barge at the Illinois Marine Towing Heritage Slip on the Chicago Ship and Sanitary Canal, Illinois on the 4 November 2019.

The barge explosion occurred when the IB1940 was being prepared for cleaning after its cargo of acetone had been unloaded. No injuries or pollution were reported in connection with the explosion. The barge, however, was declared a total constructive loss, valued at $1.75M. Continue reading “NTSB accident report concludes that incomplete safety procedures led to barge explosion”

IMSBC Code amendments come into force from 1 January 2021

IMSBC Code amendments come into force from 1 January 2021
IMSBC Code amendments come into force from 1 January 2021

As Amendment 05-19 of the International Maritime Solid Bulk Cargoes (IMSBC) Code comes into force on 1 January 2021, here are some of the changes outlined in more detail. The IMSBC Code amendments happen every two years to reflect the changes in the nature and variety of solid bulk cargoes presented for shipment. In June 2019, IMO’s Maritime Safety Committee adopted Resolution MSC.462 (101) specifying forthcoming IMSBC Code amendments (05-19).

Bauxite cargoes are subject to change with and the new criteria distinguishing a bauxite cargo that may liquefy (Group A) from one that will not (Group C). Continue reading “IMSBC Code amendments come into force from 1 January 2021”

Machinery failure caused by lubrication contamination case study

Machinery failure caused by lubrication contamination
Machinery failure caused by lubrication contamination

The Swedish Club has described an incident of machinery failure onboard due to lubrication contamination in their system. An investigation showed that the engine had been operated on a high thermal load for a long time and the turbocharger’s efficiency had been affected by fouling, while the lubrication oil had been contaminated for some time.

The vessel concerned was at anchor, in ballast, awaiting further instructions. The weather deteriorated after seven days and the vessel’s anchor dragged. The anchor was heaved up and the vessel started to slow steam in the area. After about 24 hours, the differential pressure alarm of the main engine duplex lubrication oil filter sounded in the ECR. The crew found aluminium and other Continue reading “Machinery failure caused by lubrication contamination case study”

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