The Nautilus Marine Rescue GPS is less than half the size of our original radio and is incredibly simple to use. Simply undo the latch and open, turn on, remove the antenna retainer and press the red button. That’s it! Your GPS position accurate to 1.5 metres and a man overboard distress message will be broadcast to all AIS equipped ships up to 34 miles away, as well as a special DSC message to the marine radio on your own vessel if permitted. Your Nautilus GPS floats and is waterproof in all sea conditions. Just keep the o-ring clean and forget about it for the next 5 years! Don’t get left behind!