Statutory Documents - IMO Publications and Documents - Circulars - Maritime Safety Committee - MSC.1/Circular.1206/Rev.1 – Measures to Prevent Accidents with Lifeboats – (11 June 2009) - Annex 1 - Guidelines for Periodic Servicing and Maintenance of Lifeboats, Launching Appliances and On-load Release Gear - Appendix - Specific Procedures for Maintenance and Servicing - 3 Dynamic Winch Brake Test
3 Dynamic Winch Brake Test
3.1 Annual operational testing should preferably be done by lowering the empty boat. When the boat has reached its maximum lowering speed and before the boat enters the water, the brake should be abruptly applied.
3.2 The five-year operational test should be done by lowering the boat loaded to a proof load equal to 1.1 times the weight of the survival craft or rescue boat and its full complement of persons and equipment, or equivalent load. When the boat has reached its maximum lowering speed and before the boat enters the water, the brake should be abruptly applied.
3.3 Following these tests, the brake pads and stressed structural parts should be re-inspected.
Note In loading the boat for this test, precautions should be taken to ensure that the stability of the boat is not adversely affected by free surface effects or the raising of the centre of gravity.
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