单选题On open lifeboats，the purpose of the wire stretched between the davit heads is to（）.Akeep the movement of the davits at the same speedBkeep the davits from slipping when they are in the stowed positionCprevent vibration during lowering of the boatDsupport the manropes
单选题
On open lifeboats，the purpose of the wire stretched between the davit heads is to（）.
A
keep the movement of the davits at the same speed
B
keep the davits from slipping when they are in the stowed position
C
prevent vibration during lowering of the boat
D
support the manropes
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