WATER SKI TRACTOR “DOLPHIN” WITH MECHANICAL COUPLING OF SKI, MONOSKI AND WAKEBOARD
WATER SKI TRACTOR “DOLPHIN” WITH ELECTROMAGNETIC COUPLING OF SKI
TRAWL BOARD WITH FLOW ACCELERATOR TO INCREASE LIFTING CAPACITY
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
METHOD AND DEVICE FOR ENSURING FISHING WITH THE HELP OF A FISHING VESSEL