单项选择题
A.white B.international orange C.yellow D.red
Safety shackles are fitted with（）.A.a threaded boltB.a ...
单项选择题Safety shackles are fitted with（）.
A.a threaded bolt B.a round pin，with a cotter pin C.a threaded bolt，locknuts，and cotter pins D.round pins and locknuts
Required lifesaving equipment on existing vessels may b...
单项选择题Required lifesaving equipment on existing vessels may becontinued in use on the vessel if（）.
A.kept on board no more than 2 years B.inspected and serviced every 6 months C.destroyed if more than 5 years old D.maintained in good and serviceable condition
Lines passed around the falls to hold the boat while pa...
单项选择题Lines passed around the falls to hold the boat while passengers are boarding are（）.
A.life lines B.frapping lines C.tricing lines D.tripping lines
