A、by sight and hearing only
B、by all available means besides sight and hearing
C、by all available means except sight and hearing
D、by none of above means
更多“Underway vessels shall at all time maintain a proper look-out（）.”相关的问题
A、she is underway B、she is not underway C、whether she is underway cannot be determined D、she might be or not be underway
A、vessel not under command B、sailing vessel C、vessel being towed (manned) D、vessel being towed (unmanned)
A、A vessel transferring provisions while underway B、A pushing vessel and a vessel being pushed when connected in a composite unit C、A vessel servicing a navigation mark D、A vessel launching aircraft
A、A vessel transferring provisions while underway B、A pushing vessel and a vessel being pushed when connected in a composite unit C、A vessel servicing a navigation mark D、A vessel launching aircraft
A、underway but not making way B、making way，not under command C、not under command，not making way D、trolling underway
A、underway but not making way B、making way，not under command C、not under command，not making way D、trolling underway
A、power-driven vessel stopped and making no way through the water B、vessel being towed C、vessel restricted in her ability to maneuver at anchor D、sailing vessel at anchor
A、vessel towing a submerged object B、dredge underway and dredging C、hydrographic survey vessel at anchor and surveying D、None of the above
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