Patent ID: 6791490
Filing Date: 2004-09-14
Classification: B63C,G01S

Abstract:
A system for navigating underwater comprising:an antenna operative to receive at least one GPS signal; a dive flag apparatus operative to support said antenna on or above a surface of water, said dive flag apparatus comprising; a SCUBA diving flag; a float having positive buoyancy relative to said water; a receiver, said receiver operative to process said at least one GPS signal; a signal conducting tether cable having a first end couples to said dive flag apparatus, a second end coupled to a reel or spool for collecting and dispensing said signal conducting tether cable, said signal conducting tether cable for towing and controlling said dive flag apparatus under the control of a diver; and an angle sensor mounted on or in said dive flag apparatus, said angle sensor for determining an angle between said signal conducting tether cable and said dive flag apparatus, said angle used to calculate a correction vector between a diver location and a location of said dive flag apparatus, and wherein a navigation solution presented to said diver is compensated using said correction vector.