73517611
Jan 14, 1985
Sep 3, 1985
HIGH RESOLUTION ACOUSTIC INSTRUMENTATION, NAMELY, ANALOG SONAR ALTIMETER; HIGH POWER ACOUSTIC PINGERS AND BEACONS; SUB-BOTTOM PROFILING, BATHYMETRIC AND PIPE LINE LOCATION SYSTEM; ACOUSTIC NAVIGATION TRANSPONDER; SIDE SCAN SONAR TRANSPONDER; AND SUB-SEA ACOUSTIC RELOCATION/NAVIGATION SYSTEM
Electrical and Scientific Apparatus