When compared to air temperature

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Admiralty Sailing Directions are written with the assumption that the reader ______.
- A.is familiar with all information contained in UKHO publications
- B.knows nothing about any sailing directions
- C.is lack of particular knowledge concerning the navigation of the area
- D.has the appropriate chart before him and other relevant publications to hand
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If a towing vessel and her tow are severely restricted in their ability to change course，they may show lights in addition to their towing identification lights.These additional lights may be shown if the tow is ().
- A.pushed ahead
- B.towed alongside
- C.towed astern
- D.Any of the above
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Tropic tides are caused by the ().
- A.Moon being at its maximum declination
- B.Moon crossing the equator
- C.Sun and Moon both being near 0° declination
- D.Moon being at perigee
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When one of two vessels () is required to keep out of the way the other must keep her course and speed
- A.In sight of another
- B.Sights the another
- C.Not in sight of the other
- D.In sight of one another
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Take tug's towing line to ().
- A.captain
- B.capstan
- C.capital
- D.carpenter
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When hugging a bank in a narrow channel，you should take precautions against ______.
- A.Bank suction，squat and the effects of vessels passing close aboard
- B.Clogged sea chests，plugged sea strainers and overheated machinery
- C.Striking underwater obstructions close to the bank
- D.All of the above
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From which type of cloud can a tornado or waterspout develop ().
- A.Nimbostratus
- B.Altostratus
- C.Cumulonimbus
- D.Cirrus
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Every vessel should at all times proceed at a safe speed.Safe speed isdefined as that speed where ().
- A.You can stop within your visibility range
- B.You can take proper and effective action to avoid collision
- C.You are traveling slower than surrounding vessels
- D.No wake comes from your vessel
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Buoys which mark isolated dangers are painted with alternating ().
- A.Red and black bands
- B.Green and black bands
- C.Red and white stripes
- D.Green and white bands
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The rules require that a stand-on vessel SHALL take action to avoid collision when she determines that ().
- A.risk of collision exists
- B.the other vessel will cross ahead of her
- C.the other vessel is not taking appropriate action
- D.collision cannot be avoided by the give-way vessel's maneuver alone
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When compared to air temperature，which factor is most useful in predicting fog ().