3. Low Speed Undersea Communication

Using the 16" guns of the Battleship Missouri, a pulse-code modulated message will be transmitted via the Pacific Ocean to the Ames Research Center in California. Using a combination of fixed and towed acoustic hydrophone arrays, the PCM signal will be detected, recorded, enhanced and analyzed both at fixed installations and aboard undersea vessels which have been suitably equipped. An alternative acoustic source is to use M1A1 main battle tanks firing 150 mm H.E. ordnance. It is proposed to conduct tests of this method in the Persian Gulf during the summer of 1991.