Programmable underwater acoustic beacon

Details Programmable underwater acoustic beacon Programmable underwater acoustic beacon

1975-07-23

1976-11-16

Farley, Richard A.

Communications: electrical

Selective

Intelligence comparison for controlling

340 3A, G01S 172, H04B 1100

Patent

active

039926923

ABSTRACT:
A self-contained acoustic beacon activated by a seawater switch for provig an independent method of locating and recovering a floating or submerged recoverable target. The device provides an ideal operating life for target recovery of about 36 hours as well as providing an extensive underwater range. The device also provides stable frequency operation without a crystal-controlled oscillator over a wide range of source voltages allowing use of inexpensive batteries as a voltage supply source. Additionally, the signature or output signal code of the device can be changed simply and quickly providing positive identification of the acoustic beacon and lengthened operating life span.

REFERENCES:
patent: 3249913 (1966-05-01), Smyth et al.
patent: 3305824 (1967-02-01), Brooks et al.
patent: 3342283 (1967-09-01), Pound
patent: 3673555 (1972-06-01), Raudsep

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