Now operational: an acoustic release system with back-up timer for maximum reliability. ... Max. security coding Life 1 yr. ... Useful in offshore navigation aids: remote weather stations, instrumentation power, signalling devices; cathodic protection. ... use all-silicon circuit with gain of 35 db and maximum noise of 4.0 db over range of a 20AdC to +65AdC. Weighs 5 oz., cast-aluminum case. ... Complete report of transducer system described in new folder; photos and diagrams included.