单项选择题
A position obtained by applying ONLY your vessel’s course and speed to a known position is a （）.
A.fix
B.dead-reckoning position
C.running fix
D.probable position
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相关考题
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单项选择题
A polyconic projection is based on a （）.
A.plane tangent at one point
B.cylinder tangent at one parallel
C.cone tangent at one parallel
D.series of cones tangent at selected parallels -
单项选择题
A pilot vessel on pilotage duty at night will show sidelights and a stern light （）.
A.when at anchor
B.only when making way
C.at any time when underway
D.only when the identifying lights are not being shown -
单项选择题
A pilot vessel may continue to sound an identity signal if she is （）.
A.aground
B.at anchor
C.not under command
D.being towed
