A.speed being made good
B.speed through the water
C.the set of the current
D.the depth of the water
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A.velocity of the current
B.bottom characteristics
C.depth of the water
D.speed over the ground
A.tree or log awash in a nearly vertical position
B.crew member who refuses to work
C.upstream end of a land wall
D.buoy that is adrift
A.high pressure system
B.low pressure system
C.high dew point
D.low dew point
A.At
B.In
C.During
D.With
A.Gain Control
B.Brilliant Control
C.Anti-clutter Sea Control
D.Sweep Intercept
最新試題
You are using a radar in which your own ship is shown at the center，and the heading flash always points to 0°. If bearings are measured in relation to the flash，what type of bearings are produced?（）.
The number of pulses of energy transmitted per second is call the（）.
A tall object with a light on or near the shore，to act as a guide or warning to mariners is called（）.
A radar range to a small，charted object such as a light will provide a line of position in which form?（）.
The transmission time duration of a single pulse of radio-frequency energy is a function of the（）.
The minimum range at which a target can be detected is basically determined by which of the following?（）.
An ECDIS is required to display which information?（）
Error may be introduced into a magnetic compass by（）.
An electronic depth finder operates on the principle that（）.
How is variation indicated on a small-scale nautical chart?（）.