单项选择题
A.watch B.look for C.see D.regard
ETA／PILOT REVERTING means （） ．A.ETA pilot station has b...
单项选择题ETA／PILOT REVERTING means （） ．
A.ETA pilot station has been given B.ETA pilot station will be given afterwards C.ETA pilot station was not given D.ETA pilot station is given
Data relating to the direction and velocity of rotary t...
单项选择题Data relating to the direction and velocity of rotary tidal currents can be found in the （）.
A.Mariner's Guide B.Tidal Current Tables C.Nautical Almanac D.Tide Tables
Coral atolls，or a chain of islands at right angles to t...
单项选择题Coral atolls，or a chain of islands at right angles to the radar beam，may show as a long line rather than as individual targets due to （）.
A.the effects of beam width B.limitations on range resolution C.the pulse length of the radar D.the multiple-target resolution factor
