Safety Flash
NTSB: Flooding, sinking and loss of tugboat Mangilao
NTSB: Flooding, sinking and loss of tugboat Mangilao
- IMCA
- Safety Flash
- IMCA SF 02/21
- Marine OperationsVessel and Mooring
- Mechanical failureVessel flooding and foundering
- Towing
- Marine industry
- Marine waters
Read at IMCAOpens the publisher’s page on imca-int.com
Summary
This safety flash summarises NTSB findings on a tugboat sinking during tow from Guam to Subic Bay. The investigation identified loss of a towline shackle pin as the probable cause of towing arrangement failure, leaving the vessel adrift and admitting boarding seas during a developing typhoon. No lives were lost.
Classifications: Mechanical failure; equipment failure.
Classifications: Vessel flooding and foundering; water ingress.
Classifications: Towing; towage.
Classifications: Marine industry; shipping industry; maritime sector.
Classifications: Marine waters.
Summary
A towed tug sank in heavy weather after a towline shackle pin was lost and seawater entered the vessel.
IMCA SF 02/21. Themes: marine operations, vessel and mooring.