单项选择题
A.increasing the shaft RPM prior to release
B.using a pelican hook for quick release
C.using preventers
D.using a short chain for the lead through the stern chock
单项选择题 In moderate wind and current what should be the length of chain with a single anchor?（）
单项选择题 If kinking results while wire rope is being coiled clockwise，you should（）.
单项选择题 If an attempt is made to hoist a load that exceeds the capacity of an electric winch，an overload safety device causes a circuit breaker to cut off the current to the winch motor（）.