The radar component that produces the synchronizing signal and triggers the indicator sweep is which of the following?().
A、A.transmitter
B、B.antenna system
C、C.indicator
D、D.modulator
A、A.transmitter
B、B.antenna system
C、C.indicator
D、D.modulator
A、Only a radar expert can determine if the radar is operating B、All radars have indicator lights and alarms to signal improper operation C、A radar range compared to the actual range of a known object can be used to check the operation of the radar D、The radar resolution detector must be energized to check the radar
A、Raising the antenna height increases the radar range B、The ability of radar to detect objects is unaffected by weather conditions C、Radar bearings are less accurate than radar ranges D、Radar should be checked regularly during clear weather to ensure that it is operating properly
A、should never use radar bearings B、should only use radar bearings when the range exceeds the distance to the horizon C、can use radar information from one object to fix the position D、must use information from targets forward of the beam
A、can use radar information from one object to fix the position B、should never use radar bearings C、should only use radar bearings when the range exceeds the distance to the horizon D、must use information from targets forward of the beam
A、immediately when the contact is noted on radar B、only if the radar scope is watched constantly C、after the contact has been marked at least twice D、by an occasional glance at the radar
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、The procedure may be used for some components to relocate component data to the SYSAUX tablespace from its current tablespace. B、The procedure may be used for some components to relocate component data from the SYSAUX tablespace to another tablespace. C、All the components may be moved into SYSAUX tablespace. D、All the components may be moved from the SYSAUX tablespace.
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