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 falls on gravity davits are（）.
单项选择题 The connection facilities for the international shore connection must be located to provide access（）.
单项选择题 The boat command that means complete the stroke and level the oars horizontally with the blades trimmed fore and aft is（）.
