單項選擇題

In determining a safe speed（）shall not be among those taken into account.

A.the presence of the background light at night
B.the state of wind，sea and current
C.the number of crew on board
D.the draught in relation to the available depth of water

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單項選擇題

In determining a safe speed（）shall not be among those taken into account.

A.the characteristics，efficiency and limitation of the radar equipment
B.any constraints imposed by the radar range scale in use
C.the effect on radar detection of the sea state，weather and other sources of interference
D.the safe working load of the cranes both on board and ashore

單項選擇題

In determining if risk of collision exists，if there is any doubt，such risk shall be deemed to（）.

A.exist
B.exists
C.existing
D.to be existed

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In determining a safe speed（）shall not be among those taken into account.

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In determining a safe speed（）shall not be among those taken into account.

In determining if risk of collision exists，if there is any doubt，such risk shall be deemed to（）.

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In determining if risk of collision exists，if there is any doubt，such risk shall be deemed to（）.