. Electronic navigational aids; loran, radiobeacon, and radarbeacon systems and loran, radio-direction-finder, and radar ship equipment . LaSAN TRANSMISSION CYCLE IS BEGUN BY "MASTER" STATION PULSE IS RADIATED IN ALL DIRECTIONS AND TRAVELS TOWARD BOTH "SLAVE" STATION AND NAVIGATOR AFTER WAITING FOR THE PROPER AMOUNT OF TIME TO ASSURE CORRECT SYNCHRONIZATION. THE "SLAVE" TRANS- Mrrs ITS PULSE THE NAVIGATOR HAS ALREADY RECEIVED THE PULSE FROM THE "MASTER" STATION.

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