A.the radar reflectors reflect better signals
B.fog horn signals travel farther to sea
C.it is equipped with strobe lights
D.it has a reduced watch circle
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A.are tracked on reciprocal bearings
B.are tracked at the same range
C.are tracked on the same bearing
D.pass close together
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 map like presentation for inshore navigation
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
A.sweep introduction
B.sweep interest
C.sweep intention
D.sweep intensity
A.all fishing vessels over 39 feet in length
B.sail-propelled fishing vessels
C.all fishing vessels of less than 200 GT
D.wooden hull fishing vessels with a poor radar echo
最新試題
What will cause the ARPA to emit a visual alarm，audible alarm，or both?（）
Which statement about an estimated position is TRUE?（）
You are using a radar in which your own ship is shown at the center，and the heading flash always points to 0°. If bearings are measured in relation to the flash，what type of bearings are produced? （）
Your ARPA has automatic speed inputs from the log．Due to currents，the log is indicating a faster speed than the speed over the ground.What should you expect under these circumstances（）.
Which statement is TRUE concerning a vessel equipped with operational radar?（）.
Your radar is set on a true motion display.Which of the following will NOT appear to move across the PPI scope（）.
What provides little or no indication that a vessel is dragging anchor? （）
Which statement concerning the operation of radar in fog is TRUE?（）
When you turn on the fast time constant (differentiator) control of a radar it will（）.
Which condition indicates that your radar needs maintenance?（）