单项选择题
A.dead-reckoning position B.running fix C.estimated position D.fix
A position obtained by applying ONLY your vessel’s cour...
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
A polyconic projection is based on a （）.A.plane tangent...
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
A pilot vessel on pilotage duty at night will show side...
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
