I FAIL TO UNDERSTAND HOW ANYONE, CAN MAKE A SMALL SUB THATS GUIDED AND CONTROLLED BY A VIDEO GAME . WITHOUT ELLF AS A BACKUP HOW ARE YOU SET FOR SURVIVAL. YET NO OTHER BACKUP AS WELL, NOT EVEN A LIFE JACKET. ELLF IS A PIECE OF EQUIPMENT THAT'S A BACKUP THAT SENDS A PING SOUND TO BE TRACKED👀