Radar makes the most accurate determination of the().
A、A.direction of a target
B、B.distance to a target
C、C.size of a target
D、D.shape of a target
A、A.direction of a target
B、B.distance to a target
C、C.size of a target
D、D.shape of a target
A、makes a cargo reach the farthest destination B、makes the ship go as far as she can C、is the most significant change in shipping industry D、is the most economical change in shipping industry
A、Signal absorption by the ionosphere B、Heavy sea swells C、The rescue personnel were monitoring the 10-cm radar D、The rescue personnel were monitoring the 3-cm radar
A、the best fix is obtained by using a tangent bearing and a range B、and using two radar ranges for a fix,the objects of the ranges should be close to reciprocal bearings C、and using ranges,the most rapidly changing range should be measured last D、and crossing a radar range of one object with the visual bearing of a second object,the two objects should be 80°to 110°apart
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、You should make an ample change to port for a vessel crossing on the starboard bow B、You should maneuver in ample time if a close-quarters situation is developing C、You should determine the course and speed of all radar contacts at six minute intervals D、Long-range scanning will provide early warning of ALL other vessels within the radar's range
A、you should make an ample change to port for a vessel crossing on the starboard bow B、You should maneuver in ample time if a close-quarters situation is developing C、You should determine the course and speed of all radar contacts at six minutes intervals D、Long-range scanning will provide early warning of all other vessels within the radar’s range
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