DEVICE FOR LOCATING HAZARDS AND OBSTACLES IN A MARINE ENVIRONMENT COMPRISED OF OPTICAL RECEIVERS, FLASH TUBES, LASERS, OPTICAL PRISMS, OPTICAL FILTERS, LIGHT DETECTORS, TIMERS, OPTICAL SCANNERS, ELECTRICAL SIGNAL PROCESSING CIRCUITRY, AND DEPTH AND RANGE INDICATORS

'circuitri':30 'compris':11 'depth':32 'detector':23 'devic':1 'electr':27 'environ':10 'filter':21 'flash':15 'hazard':4 'indic':35 'laser':17 'light':22 'locat':3 'marin':9 'obstacl':6 'optic':13,18,20,25 'prism':19 'process':29 'rang':34 'receiv':14 'scanner':26 'signal':28 'timer':24 'tube':16

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