Check out Bluefin Robotics based in Cambridge MA. They make a variety of UAVs (Autnomous Underwater Vehicles), including a glider.
Shown here is the Bluefin-21 AUV, the world’s smallest deep water survey AUV. They also make the Bluefin-9, the Bluefin-12, Bluefin-21BPAUV, HAUV (Hovering Autonomous Underwater Vehicle) and a glider called SPRAY. The sensors can be integrated into an AUV:
•Doppler Velocity Logs • Acoustic Doppler Current Profilers
• Conductivity and Temperature • Fluorometer
• Li-Cor PAR sensor • Inertial Navigation Systems
• Attitude Heading Reference • Depth Gauges
• Global Positioning Systems
These UAV’s have easily swappable batteries and data modules for fast turn around time between dives.
Watch the Bluefin-21 movie .