SUBMARINE HYDRO ACOUSTIC SUITE NOISE DIRECTION-FINDING SYSTEM
RADIO-HYDROACOUSTIC BUOY ON MICROCONTROLLER WITH ACOUSTIC UNDERWATER COMMUNICATION UNIT
RADIO-HYDROACOUSTIC BUOY ON MICROCONTROLLERS WITH BASE DATA OF REFERENCE SIGNALS
NAVIGATION RADIO-OPTICAL GROUP REFLECTOR OF CIRCULAR ACTION
NAVIGATIONAL RADIOOPTICAL ANGLE REFLECTOR OF DIRECTIONAL ACTION WITH LIGHT-REFLECTING FACES
DEVICE FOR ENERGY TRANSMISSION TO SELF-CONTAINED UNDERWATER VEHICLE
DEPTH-ACTIVATED SENSOR SWITCH AND METHOD OF SWITCHING IT OFF