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Position and Direction on the Earths Surface
Admiralty Charts and Publications
The Ships Position and Track
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accuracy adjustment Admiralty List alter course alteration of course anchor angle axis binnacle blasts buoy cables carry centre chronometer chronometer watches collision correct course and speed 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 minutes nautical miles Navigating Officer normally North Notices to Mariners object observed obtained operation parallel Pilotage plotted port position line power-driven vessel prescribed in Rule radar range relative track rotation Sailing Directions scale seaplane sextant ship's position shown in Fig sidelights sky waves starboard station submarine supplied switch tidal stream tide towing transmission transmitting true bearing vertical vessel engaged visibility whistle white light zone