單項選擇題A signal of intent must be sounded in international waters by().

A.a vessel meeting another head-on
B.a vessel overtaking another in a narrow channel
C.a vessel crossing the course of another
D.the give-way vessel in a crossing situation


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1.單項選擇題A sailing vessel shall not impede the safe passage of a().

A.power-driven vessel following a traffic lane
B.pilot vessel enroute to a pilot station
C.law enforcement vessel
D.All of the above

2.單項選擇題A sailing vessel is overtaking a power-driven vessel in a narrow channel,so as to pass on the power-driven vessel’s port side. The overtaken vessel will have to move to facilitate passage. The sailing vessel is the().

A.stand-on vessel and would sound two short blasts
B.give-way vessel and would sound no whistle signal
C.stand-on vessel and would sound no whistle signal
D.give-way vessel and would sound two prolonged blasts followed by two short blasts

3.單項選擇題A power-driven vessel pushing aheador towing alongside displays navigation lights and().

A.two all-round red lights in a vertical line
B.two yellow towing lights in a vertical line
C.two white masthead lights in a vertical line
D.two lights on the stern,one yellow and one white

4.單項選擇題A power-driven vessel leaving a quay or wharf must sound what signal? ()

A.Three short blasts
B.A long blast
C.A prolonged blast
D.No signal is required

5.單項選擇題A light used to signal passing intentions must be an().

A.alternating red and yellow light
B.alternating white and yellow light
C.all-round white or yellow light
D.all-round white light only