McMurdo Pains-Wessex. You need to buy the pressureproof can for it. None are designed for diving depths. I have half a mind to require them for offshore dives on EXPLORER. Might do so next year. In order for this to be truly 'self sufficient', it will also need me to spring for another $4K to install:
McMurdo/Pains Wessex Direction Finder at Wholesale Prices
This is the system that receives the 121.5 low power beacon from the EPIRB for local direction finding. And people wonder why it costs money to safely dive offshore...
Dave
Would a VHF radio (with a signal strength meter) and a multi element antenna not accomplish the same thing for about 1/5th the price?