WATER SKI TRACTOR “DOLPHIN” WITH ELECTROMAGNETIC COUPLING OF SKI
WATER SKI TRACTOR “DOLPHIN” WITH MECHANICAL COUPLING OF SKI, MONOSKI AND WAKEBOARD
METHOD AND DEVICE FOR ENSURING FISHING WITH THE HELP OF A FISHING VESSEL
TRAWL BOARD WITH FLOW ACCELERATOR TO INCREASE LIFTING CAPACITY
RADIO-HYDROACOUSTIC BUOY ON MICROCONTROLLERS WITH BASE DATA OF REFERENCE SIGNALS
DEVICE FOR ATTACHMENT OF TOWING CABLE TO OPENING DEVICE
RADIO-HYDROACOUSTIC BUOY ON MICROCONTROLLER WITH ACOUSTIC UNDERWATER COMMUNICATION UNIT
SUBMARINE HYDRO ACOUSTIC SUITE NOISE DIRECTION-FINDING SYSTEM
DEPTH-ACTIVATED SENSOR SWITCH AND METHOD OF SWITCHING IT OFF
NAVIGATIONAL RADIOOPTICAL ANGLE REFLECTOR OF DIRECTIONAL ACTION WITH LIGHT-REFLECTING FACES