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