航海英语地文航海章节练习(2018.01.26)

A.Flashing red lights upstream and fixed red lights downstream
B.Yellow unlighted buoys
C.Signs and/or flashing red lights
D.Red daymarks upstream and green daymarks downstream

A.the primary great circle of the Earth perpendicular to the axis
B.the line to which all celestial observations are reduced
C.the line from which a celestial body's altitude is measured
D.All of the above

A.must utilize magnetic courses
B.must take set and drift into account
C.should be replotted hourly
D.should be started each time the vessel's position is fixed

A.Dead reckoning position
B.Leeway position
C.Estimated position
D.Set position

A.bottom contour only up to depths of 100 fathoms
B.depth underneath the keel against a time base
C.contour of the bottom against a distance base
D.depth of water against a distance base

A.keep the buoy on the vessel's starboard side when approaching a port and on the vessel's port side when leaving
B.keep the buoy on the vessel's port side when approaching a port and on the vessel's starboard side when leaving
C.keep the buoy on the vessel's starboard side when approaching and leaving
D.keep the buoy on the vessel's port side when approaching and leaving

A.running fix
B.dead-reckoning position
C.fix
D.estimated position

A.Running fix
B.Fix
C.Dead-reckoning position
D.Estimated position

A.dead reckoning
B.Pilotage
C.great circle sailing
D.geographic navigation

A.a line connecting two charted objects
B.a line on some point of which the vessel may be presumed to be located
C.the position of your vessel
D.not used in a running fix