更多"Radar beacons are transmitters desi"的相关试题:
[单项选择]The 10-cm radar as compared to a 3-cm radar of similar specifications will（）.
A. be more suitable for river and harbor navigation
B. provide better range performance on low lying targets during good weather and calm seas
C. have a wider horizontal beam width
D. have more sea return during rough sea conditions
[单项选择]（）is capable of finding any 406MHZ beacons no matter where they are.
A. Local User Terminal
B. Spacecraft
C. Local-mode coverage
D. Near polar orbiting satellites
[单项选择]The 3-cm radar as compared to a 10-cm radar with similar specifications will（）.
A. give better range performance in rain，hail，etc
B. display small targets in a mass of dense sea clutter at a greater range
C. have less sea return in choppy rough seas
D. display a more maplike presentation for inshore navigation
[单项选择]I（）shorebased radar assistance.
A. ask
B. look for
C. require
D. in need of
[单项选择]The radar component that produces the synchronizing signal and triggers the indicator sweep is which of the following?（）.
A. transmitter
B. antenna system
C. indicator
D. modulator
[单项选择]Details of coast radio stations and radar stations can be found in（）.
A. Admiralty Chart
B. Admiralty Light list
C. Admiralty List of Radio Signals
D. Admiralty Notices to Mariners
[单项选择]Vessel required to have an Automatic Radar Plotting Aid must have a device to indicate the（）.
A. speed of the vessel over the ground or through the water
B. distance to the next port
C. time of the next navigational satellite pass
D. None of the above
[单项选择]Which of the following radar contacts will present the most immediate danger?（）.
A. A vessel on the starboard bow whose bearing is changing and range is decreasing
B. A vessel on the starboard bow whose bearing is steady and range is increasing
C. A vessel on the port bow whose bearing is steady and range is decreasing
D. A vessel on the port bow whose bearing is changing to the left and range decreasing
[单项选择]Radar makes the most accurate determination of the（）.
A. direction of a target
B. distance to a target
C. size of a target
D. shape of a target
[单项选择]Which condition indicates that your radar needs maintenance?（）
A. Serrated range rings
B. Indirect echoes
C. Multiple echoes
D. Blind sector
[单项选择]Would you please（）on the radar?
A. switch
B. to switch
C. switched
D. will switch
[单项选择]I have（）you on my radar.
A. seen
B. sighted
C. watched
D. located
[单项选择]（）is on the panel of radar.
A. KEYLOCK
B. REPEATER
C. STATIC INVERTER
D. ANTI-CLUTTER-SEA
[单项选择]The radar control that shortens all echoes on the display and reduces clutter caused by rain or snow is the（）.
A. sensitivity time control (sea clutter control)
B. receiver gain control
C. brilliance control
D. fast time constant (differentiator)
