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
Lighted information markers show（）.
A vessel is fishing at anchor on the high seas. Which of the following day signals should she display if she has gear extending out over 150 meters horizontally from the vessel?（）.
A red triangular daymark marks（）.
Entering from seaward，triangular-shaped daymarks are used to mark（）.
A safe water daymark has what shape? （）
Approaching an anchorage in fog，you hear one short，one prolonged，and one short blast in that sequence on a ship’s whistle． This indicates（）.
A power-driven vessel towing another vessel astern (tow less than 200 meters) shall show （）.
An all-round flashing yellow light may be exhibited by a(n)（）.
The International Regulations for Preventing Collisions at Sea contain the requirements for （）.
A power-driven vessel，when towing astern，shall show（）.