In determining safe speed，all of the following must be taken into account EXCEPT the （).

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

A、A. the state of wind, sea and current

B、B. the traffic density

C、C. the presence of the background light at night

D、D. A+B+C

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

A.the state of visibility

B.the power of the vessel

C.the traffic density

D.the maneuverability of the vessel

A.radio communications that are available

B.maximum speed of your vessel

C.temperature

D.current

A.the state of visibility

B.the traffic density

C.the number of crew on board

D.the maneuverability of the vessel

A.limitations of radar equipment

B.presence of background lights at night

C.maximum horsepower of your vessel

D.maneuverability of your vessel

A.Limitations of radar equipment

B.Presence of background lights at night

C.Maximum horsepower of your vessel

D.Maneuverability of your vessel

At 1100 UTC on 28 May 2003，the container vessel P&O Nedlloyd Vespucci and the yacht Wahkuna collided in the English Channel in poor visibility．

Each vessel had detected the other by radar when at a range of about 6 miles．The container ship was on a course of 255°（T）at a speed of 25 knots．The yacht was on the port bow of the container ship on a course of 012°（C）at a speed of 7.5 knots，and was due to pass about 8 cables ahead of the container ship．The skipper of the yacht，however，incorrectly estimated from his radar display that P&O Nedlloyd Vespucci was passing 1.5 miles ahead of Wahkuna，and reduced speed by disengaging his engine．This action，which also resulted in a substantial alteration in the yacht&39;s heading as it lost steerage，put the two vessels on a collision course．The actions of the yacht，the CPA of which now appeared as 2 cables to port on ARPA，concerned and confused the master of P&O Nedlloyd Vespucci，but he was reluctant to take any manoeuvring action because he was uncertain of what the yacht would do next．

Minutes later，the vessels collided and the bulbous bow of P&O Nedlloyd Vespucci struck the forward part of Wahkuna&39;s hull，demolishing the first 3m of her hull and dismasting her．Despite having sent a lookout to the port bridge wing，the master of the container ship was not aware that a collision had occurred，and continued on passage．The yacht crew had to abandon to a liferaft，where they stayed for 5.5 hours before being rescued.

问题：

In the situation referred to in this massage，the speed of P&O Nedlloyd Vespucci ________．

A.was too fast

B.was too slow

C.was a safe one

D.could not be determined if safe or not

The bridge resource management on board P&O Nedlloyd Vespucci ________．A.was efficient

B.was poor

C.was too strict comparing with other ships

D.could not be determined if efficient or poor

It can be concluded that ________ failed to keep an effective radar lookout．A.P&O Nedlloyd Vespucci

B.Wahkuna

C.both P&O Nedlloyd Vespucci and Wahkuna

D.neither P&O Nedlloyd Vespucci nor Wahkuna

It appears that ________ was not a factor contributing to the collision．A.The inability of the yacht skipper to use radar effectively

B.Acceptance by the master of the container ship of a small passing distance

C.Over-confidence in the accuracy of ARPA by the master of the container ship

D.lack guidance to assist in determining a safe speed in restricted visibility

材料：

At 1100 UTC on 28 May 2003，the container vessel P&O Nedlloyd Vespucci and the yacht Wahkuna collided in the English Channel in poor visibility．

Each vessel had detected the other by radar when at a range of about 6 miles．The container ship was on a course of 255°（T）at a speed of 25 knots．The yacht was on the port bow of the container ship on a course of 012°（C）at a speed of 7.5 knots，and was due to pass about 8 cables ahead of the container ship．The skipper of the yacht，however，incorrectly estimated from his radar display that P&O Nedlloyd Vespucci was passing 1.5 miles ahead of Wahkuna，and reduced speed by disengaging his engine．This action，which also resulted in a substantial alteration in the yacht&39;s heading as it lost steerage，put the two vessels on a collision course．The actions of the yacht，the CPA of which now appeared as 2 cables to port on ARPA，concerned and confused the master of P&O Nedlloyd Vespucci，but he was reluctant to take any manoeuvring action because he was uncertain of what the yacht would do next．

Minutes later，the vessels collided and the bulbous bow of P&O Nedlloyd Vespucci struck the forward part of Wahkuna&39;s hull，demolishing the first 3m of her hull and dismasting her．Despite having sent a lookout to the port bridge wing，the master of the container ship was not aware that a collision had occurred，and continued on passage．The yacht crew had to abandon to a liferaft，where they stayed for 5.5 hours before being rescued.

问题：

In the situation referred to in this massage，the speed of P&O Nedlloyd Vespucci ________．

A.was too fast

B.was too slow

C.was a safe one

D.could not be determined if safe or not

The bridge resource management on board P&O Nedlloyd Vespucci ________．A.was efficient

B.was poor

C.was too strict comparing with other ships

D.could not be determined if efficient or poor

It can be concluded that ________ failed to keep an effective radar lookout．A.P&O Nedlloyd Vespucci

B.Wahkuna

C.both P&O Nedlloyd Vespucci and Wahkuna

D.neither P&O Nedlloyd Vespucci nor Wahkuna

It appears that ________ was not a factor contributing to the collision．A.The inability of the yacht skipper to use radar effectively

B.Acceptance by the master of the container ship of a small passing distance

C.Over-confidence in the accuracy of ARPA by the master of the container ship

D.lack guidance to assist in determining a safe speed in restricted visibility

请帮忙给出每个问题的正确答案和分析，谢谢！