Redundancy is cheap. Keep the present system and add a second automatically jettisoned flash memory copy of all data that is designed to float if at sea. It wo

Redundancy is cheap. Keep the present system and add a second automatically jettisoned flash memory copy of all data that is designed to float if at sea. It would also transmit a signal that would include its GPS location if possible. Jettisoning could be set to occur at a given altitude, a given set of data values or a given acceleration/deceleration values.