For full information regarding the current circulation of the Indian Ocean，（） Sailing Direction，Current Atlas，etc．

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

A.Mariner's Guide
B.Tidal Current Tables
C.Nautical Almanac
D.Tide Tables

A.the effects of beam width
B.limitations on range resolution
C.the pulse length of the radar
D.the multiple-target resolution factor