单项选择题
A.bases B.gudgeons C.pintles D.rudder lugs
The owner or Master of a towing vessel shall ensure tha...
单项选择题The owner or Master of a towing vessel shall ensure that all tests and inspections of gear take place and are logged（）.
A.on each watch，immediately before being relieved B.before embarking on a voyage of more than 24 hours C.daily，at 1200 local zone time D.weekly，before 0000 Sunday
A.when a new Master assumes command B.daily，at 0800 local zone time C.weekly，before 2400 Saturday D.immediately after assuming the watch
The irregular black line around a charted light such as...
单项选择题The irregular black line around a charted light such as Race Rock Light indicates that it is （）.
A.unwatched B.surrounded by riprap C.a minor light D.constructed on an artificial island
