單項(xiàng)選擇題
A.between sunset and sunrise B.only between 8 AM and 4 PM C.during daylight hours in any visibility D.during daylight hours in unrestricted visibility only
A.National Geospatial-Intelligence Agency B.Coast Guard C.Naval Observatory D.National Ocean Service
A.longitudinally B.vertically C.transversely D.intermittently
A.pilot charts B.Notices to Mariners C.Tide Tables D.Current Tables
A.Selected Worldwide Marine Weather Broadcasts B.your local newspaper C.the Notice to Mariners D.the daily weather map