s it measured? How much clearance would you consider to be normal?РWeardown of a propeller shaft refers to the drop of the shaft or the wear of shaft bearing. The bridge gauge or weardown gauge is used to measure wear of the shaft in relation to its own housing in a static condition. I would consult the instruction manual for the normal clearance.Р40. Name some machines that would require attention and preparation prior to IOPP survey.РI should pay attention to the following machines and documents before IOPP inspection: Oily-water separator, ODM (oil discharge monitor), incinerator, bilge pumping equipment, sewage plant, oil content meter, quick closing valves, garbage management and oil record book. I should make sure that all these machines are well prepared for survey and questioning.
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