更多"A signal indicating Greenwich mean "的相关试题:
[单项选择]The firing of a red star signal may mean（）.
A. This is the best place to land
B. You are seen - assistance will be given as soon as possible
C. Tail block is made fast
D. Slack away
[单项选择]Which spoken emergency signal would you use to call a boat to come assist a man overboard?（）
A. Distress signal
B. Urgency signal
C. Safety signal
D. None of the above
[单项选择]A signal indicating zone time is preceded with the letter（）.
A. L
B. N
C. T
D. Z
[单项选择]The maximum difference between mean time and apparent time is （）.
A. equal to the longitude expressed in time units
B. about 16 minutes
C. the difference between the GHA of mean sun and the first point of Aries
D. 15°of arc
[单项选择]MSTP设备运行的平均无故障时间（MTBF-Mean Time Between Failure）应不小于（）。
A. 50000小时
B. 60000小时
C. 80000小时
D. 100000小时
[单项选择]MDT为平均停工时间（Mean Down Time），也称为平均延误时间（Mean Delay Time），它等于（）
A. 预防性时间+纠正性时间
B. 纠正性时间+等待时间
C. 纠正性时间+预防性时间+等待时间
D. 平均修理时间-平均间隔时间
[单项选择]What would NOT be a distress signal?（）.
A. MAYDAY sent by radiotelephone
B. Continuous sounding of fog horn
C. Green star shells fired from a launcher
D. Square flag and ball in a vertical line
[单项选择]What would most likely prevent a SART’s signal from being detected?（）
A. Signal absorption by the ionosphere
B. Heavy sea swells
C. The rescue personnel were monitoring the 10-cm radar
D. The rescue personnel were monitoring the 3-cm radar
[单项选择]A mean sun is used as the reference for solar time for three reasons. Which reason is NOT a cause for use of a mean sun?（）
A. The motion of the apparent sun is along the ecliptic
B. Measurement of time is along the celestial equator
C. The speed of the Earth's revolution is not constant
D. There are variations in the Earth's rotational speed
[单项选择]Where would you find information about the time of high tide at a specific location on a particular day of the year?（）
A. Tide Tables
B. Tidal Current Tables
C. Coast Pilot
D. Nautical Almanac
[单项选择]Which signal is recognized as a distress signal?（）.
A. Directing the beam of a searchlight at another vessel
B. A smoke signal giving off orange colored smoke
C. A whistle signal of one prolonged and three short blasts
D. International Code Signal PAN spoken over the radiotelephone
[单项选择]If they mean to you（）they mean to me, they may perhaps be helpful also to our sons for their guidance and inspiration.
A. who
B. what
C. that
D. just as
[单项选择]A distress signal（）.
A. consists of 5 or more short blasts of the fog signal apparatus
B. consists of the raising and lowering of a large white flag
C. may be used separately or with other distress signals
D. is used to indicate doubt about another vessel's intentions
[单项选择]Which radiotelephone signal indicates receipt of a distress message?（）
A. Roger wilco
B. Romeo，romeo，romeo
C. SOS acknowledged
D. Mayday roger
[单项选择]Concerning the identification signal for a pilot vessel，in fog，which statement is TRUE?（）
A. When at anchor，the pilot vessel is only required to sound anchor signals
B. The identification signal must be sounded any time the pilot vessel is underway
C. The pilot vessel may only sound the identity signal when making way
D. All of the above
