A.Geographical positions outlining the area of the sector
B.True bearings as observed from the ship toward the light
C.An outline of the area of the sector
D.True bearings as observed from the light toward the ship
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A.show a fixed red light if lighted
B.show a Morse (A) white light
C.be square in shape
D.have an even number if numbered
A.must be displayed when day signals are being used
B.must be displayed when moored to a pier
C.may be extinguished at night on open waters when no other vessels are in the area
D.may be displayed during daylight
A.green lights
B.red lights
C.yellow lights
D.white lights
A.mile board
B.dredging mark
C.passing daymark
D.crossing daymark
A.drilling
B.soil reactions
C.temperature
D.current
最新試題
A vessel being towed astern，where the length of the tow exceeds 200 meters，will exhibit （）.
An occulting light is one in which（）.
An all-round flashing yellow light may be exhibited by a(n)（）.
As defined in the Rules，a towing light is a yellow light having the same characteristics as a(n)（）.
An inconspicuous，partly submerged vessel or object being towed，where the length of tow is 100 meters，shall show（）.
A safe water daymark has what shape? （）
During the day，a vessel with a tow over 200 meters in length will show（）.
A power-driven vessel towing another vessel astern (tow less than 200 meters) shall show （）.
All fog signals shall be sounded every two minutes with the exception of a vessel（）.
Daymarks marking the starboard side of the channel when going towards the sea are（）.