单项选择题
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
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