單項(xiàng)選擇題()should be used during the poor visibility if the radar’s screen shows heavy sea returns.

A.Gain Control
B.Brilliant Control
C.Anti-clutter Sea Control
D.Sweep Intercept


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1.單項(xiàng)選擇題()is on the panel of radar.

A.KEYLOCK
B.REPEATER
C.STATIC INVERTER
D.ANTI-CLUTTER-SEA

3.單項(xiàng)選擇題What will NOT induce errors into a doppler sonar log?()

A.Increased draft
B.Pitch
C.Roll
D.Change in trim

4.單項(xiàng)選擇題The microsecond unit of time is used in radar applications. The microsecond represents which of the following?().

A.one-millionth part of a second
B.one-thousandth part of a second
C.one-hundredth part of a second
D.one-tenth part of a second

5.單項(xiàng)選擇題The minimum range at which a target can be detected is basically determined by which of the following?().

A.persistence
B.pulse repetition rate
C.pulse length
D.rotation rate