單項(xiàng)選擇題In the absence of a route leading from seaward，the conventional direction of buoyage generally follows（）.

A.an anti-clockwise direction around land masses
B.a clockwise direction around land masses
C.an anticlockwise direction around sea masses
D.a clockwise direction around sea masses


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1.單項(xiàng)選擇題In regions where ice conditions prevail in the winter，（）.

A.the lantern panes of unattended lights may not become covered with ice or snow
B.the lantern panes of unattended lights may become covered with ice or snow
C.ice or snow is likely caused colored
D.the white lights are likely caused to appear colored

2.單項(xiàng)選擇題A vessel shall not（）.

A.enter the traffic separation zone in an emergency
B.cross a traffic lane
C.engage in fishing in the separation zone
D.proceed in an inappropriate traffic lane

3.單項(xiàng)選擇題A sailing vessel shall not impede the safe passage of a（）．

A.power-driven vessel following a traffic lane
B.pilot vessel enroute to a pilot station
C.law enforcement vessel
D.All of the above

4.單項(xiàng)選擇題（）is not a type of IALA maritime buoyage system.

A.special marks
B.isolated danger marks
C.cardinal marks
D.fore and aft marks

5.單項(xiàng)選擇題When using the anchor to steady the bow while approaching a dock you must be aware of the fact that（）.

A.the vessel will tend to take a large sheer towards the side where the anchor is down
B.steering control is ineffective in trying to turn to the side opposite to that of the anchor being used
C.the anchor cable must never lead under the hull
D.using an offshore anchor decreases the chances of the anchor holding