A.a 5 second ringing of a bell forward and a 5 second sounding of a gong aft at intervals of 1 minute
B.one prolonged followed by two short blasts every 2 minutes
C.one prolonged followed by three short blasts every minute
D.one prolonged followed by three short blasts every 2 minutes
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A.A bell signal
B.A gong signal
C.A whistle signal
D.All of the above
A.underway but not making way
B.making way，not under command
C.not under command，not making way
D.trolling underway
A.I intend to meet you starboard to starboard
B.I do not intend to hold course and speed
C.I intend to overtake you on your port side
D.I intend to alter my course to port
A.A power-driven vessel
B.A vessel engaged on pilotage duty
C.A vessel dredging
D.A vessel restricted in her ability to maneuver
A.not under command
B.being towed
C.on pilotage duty
D.aground
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Environmental loading consists of the forces caused by wind，waves，and（）.
A red triangular daymark marks（）.
A power-driven vessel towing another vessel astern (tow less than 200 meters) shall show （）.
On entering from seaward，a starboard side daymark will（）.
An inconspicuous，partly submerged vessel or object being towed，where the length of tow is 100 meters，shall show（）.
A vessel towing where the tow prevents her from changing course shall carry（）.
A power-driven vessel，when towing astern，shall show（）.
A triangular daymark would be colored（）.
Lighted information markers show（）.
At sea，you are approaching a small vessel and see that it has the signal flag P hoisted. What should you do?（）.