单项选择题
The maximum speed of lowering for a lifeboat on gravity davits is controlled by the（）.
A.limit switches B.emergency disconnect switch C.governor brake D.position of the counterweight on the brake handle
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（）.
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（）.
