Admiralty Manual of Navigation, Volumen 1

accuracy adjustment Admiralty List alter course alteration of course anchor angle axis binnacle buoy cables centre chart chronometer chronometer watches collision correct course and speed course to steer cruiser Decca decometer deviation distance Earth echo error example fathoms feet fog signal folio frequency given gyro gyro-compass H.M. ships height horizontal Hydrographic indicated intervals knots lane latitude length lights prescribed List of Radio log speed Loran magnetic bearing magnetic compass manoeuvre mark masthead light meridian method metres miles nautical miles Navigating Officer normally North Notices to Mariners object observed obtained operation parallel Pilotage plotted pointer port position line power-driven vessel precession prescribed in Rule radar range relative track rotation Sailing Directions scale seaplane sextant ship's position shown in Fig sky waves starboard station submarine supplied switch tidal stream tide towing transmission transmitting vertical vessel engaged visibility whistle white light zone