The best estimate of the wind di

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The best estimate of the wind direction at sea level can be obtained from observing the direction of the ().
- A.cloud movement
- B.vessel heading
- C.waves
- D.swells
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You hear on the radiotelephone the word“Securite”spoken three times.This indicates that ().
- A.A message about the safety of navigation will follow
- B.A message of an urgent nature about the safety of a ship will follow
- C.The sender is in distress and requests immediate assistance
- D.You should secure your radiotelephone
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What is meant by the term“radio silence”().
- A.Stations not directly involved with the on-going distress communications may not transmit on the distress frequency or channel
- B.Stations remaining off the air to safeguard proprietary information
- C.Two three-minute silent periods，at 15 and 45 minutes after the hour，that provide a transmitting“window”for distressed vessels to transmit distress alerts using J3E
- D.Communications on a distress frequency or channel is banned for 24 hours following the cessation of the distress traffic
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When a vessel sees the other ahead or nearly ahead，by night she could see the masthead lights of the other in a line or nearly in a line or both side lights，()shall be deemed to exist.
- A.head-on situation
- B.end-situation
- C.crossing situation
- D.close-quarters situation
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Which signal is detected as originating from a SART ().
- A.The Morse code distress series S-O-S repeated 3 times followed by DEand the vessel's call sign
- B.A line of blip code on a radar screen outward from the SART's position along its line of bearing
- C.A line of blip code on a radar screen inward from the SART's position to its own ship along its line of bearing
- D.None of these
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The maximum draft to which a ship can legally be submerged is indicated by the ().
- A.Load Line mark
- B.Certificate of Inspection
- C.Muster List
- D.Tonnage mark
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A large angle of list can be created by which of the following ________.① Negative initial stability;② Off center weight.
- A.① only
- B.② only
- C.Either ① or ②
- D.Neither ① nor ②
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When using the hand crank on gravity davits，you should ALWAYS ()__.
- A.make sure the hand brake is disengaged
- B.put the emergency disconnect switch in the off position
- C.make sure the crank is in the locked position
- D.disconnect the limit switch
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In working out a local apparent noon sight for your latitude，you subtract the Ho from 90°.The 90° represents the angular distance from ().
- A.the equator to the elevated pole
- B.your horizon to your zenith
- C.your zenith to the elevated pole
- D.the geographical position of the Sun to the elevated pole
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Which is an indication of reserve buoyancy ().
- A.Metacentric height
- B.Righting moment
- C.Rolling period
- D.Freeboard
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The best estimate of the wind direction at sea level can be obtained from observing the direction of the ().