Xenon Beacon Instructions The beacon should be plugged into the gold connector on the boat and will remain inactive until a low battery condition occurs. The beacon will begin to flash after about 27 minutes use from a full charge. This will allow about 13 minutes to retrieve the boat (400 yards) and recharge. The beacon should stop flashing if you stop all power. If the beacon remains flashing with no power applied then you are in danger of not having enough power to return. It is wise to return the boat as soon as the beacon starts flashing to allow for conditions. In cold weather the 13 minute safety margin may be down to below five minutes. If you do find yourself in difficulties, then let the boat drift for as long as practical and then try again.