你可能感興趣的試題

單項(xiàng)選擇題

A vessel which is being assisted by an icebreaker would display a flag hoist consisting of the code numeral 4 when the vessel（）.

A.speed begins to drop
B.stops
C.receives ice damage
D.becomes icebound

單項(xiàng)選擇題

A vessel which is being assisted by an icebreaker should indicate that she is ready to cast off the towline by（）.

A.displaying code letter Y (Yankee)
B.sounding five short blasts on his whistle
C.displaying code numeral 5
D.sounding one prolonged blast on his whistle

All persons or vessels within the lock area，including the lock approach channels，come under the authority of the（）.

你可能感興趣的試題

A vessel which is being assisted by an icebreaker would display a flag hoist consisting of the code numeral 4 when the vessel（）.

A vessel which is being assisted by an icebreaker should indicate that she is ready to cast off the towline by（）.

All persons or vessels within the lock area，including the lock approach channels，come under the authority of the（）.