A radar display in which North is always at the top of the screen is a(n)().
A、A.unstabilized display
B、B.stabilized display
C、C.composition display
D、D.relative display
A、A.unstabilized display
B、B.stabilized display
C、C.composition display
D、D.relative display
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
A、A.give better range performance in rain,hail,etc B、B.display small targets in a mass of dense sea clutter at a greater range C、C.have less sea return in choppy rough seas D、D.display a more map like presentation for inshore navigation
A、increase the brilliance of the PPI scope B、turn off the interference controls on the radar C、use the maximum available range setting D、increase the radar signal output
A、Radar ranges are less accurate in fog B、Navigation buoys will always show up on radar C、A sandy beach will show up clearer on radar than a rocky cliff D、Small wooden boats may not show up on radar
A、The Master of the vessel must be on the bridge when the radar is in use B、The radar equipment is only required to be used in restricted visibility C、The use of a radar excuses a vessel from the need of a look-out D、This equipment must be used to obtain early warning of risk of collision
A、the characteristics,efficiency and limitation of the radar equipment B、any constraints imposed by the radar range scale in use C、the effect on radar detection of the sea state,weather and other sources of interference D、the safe working load of the cranes both on board and ashore