A、over 3 knots headway
B、at any speed astern
C、at any speed ahead
D、over 1 knot sternway
更多“The bow thruster generally is ineffective at（）.”相关的问题
A、A lightly laden vessel requires as much stopping distance as a fully laden vessel when the current is from astern B、A vessel is dead in the water when the back wash from astern operation reaches the bow C、A tunnel bow thruster can be used in an emergency to reduce the stopping distance D、When a vessel is dead in the water any speed displayed by doppler log reflects the current
A、right at the bow B、one-third the length of the vessel from the bow C、one-half the length of the vessel from the bow D、two-thirds the length of the vessel from the bow
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