Patent ID: 6029515
Filing Date: 2000-02-29
Classification: B63C,G01C,G01S

Abstract:
A spatial orientation system to facilitate navigation for a diver under water, comprisinga base station fixable at a location to which the diver wants to arrive after completing a dive, said base station comprising transmitter means for transmitting a signal, anda mobile unit adapted to be carried by the diver, said mobile unit comprising a compass and locating means for determining information on a return direction from the current position of said mobile unit to said base station, said locating means comprisingreceiving means for receiving the signal transmitted by said transmitter means of said base station,converting means for converting the signal to information on the return direction of said mobile unit to said base station upon receipt of the signal by said receiving means, andcombining means for combining said information on the return direction of said mobile unit to said base station from said converting means with magnetic information on the current position of the diver obtained from said compass in order to maintain current information on the return direction irrespective of the momentary location and position of the diver and said mobile unit.