单项选择题
The Master or person in charge of a ship shall insure that each deck from which lifeboats are launched is（）.
A.surfaced with a nonskid texture B.roped off to prevent unnecessary access C.kept clear of any obstructions that would interfere with launching D.posted with a list of persons assigned to the lifeboat
单项选择题 The lifeboat releasing gear lever should be marked with the words（）.
单项选择题 The length of the steering oar in a lifeboat is（）.
单项选择题 The grab rail of a metal lifeboat is normally located（）.
