MIT Scientists Develop Underwater GPS Device Powered by Sound Waves
The First Underwater Tablet Computer with Touchscreen and GPS May Be on the Way | Sport Diver
Underwater GPS – Discovery of Sound in the Sea
Pelican Case - Water Linked AS
Underwater GPS made possible using a bio-inspired camera - YouTube
News | Collins Aerospace announces world's first military Underwater Navigation System that supports the new generation of military GPS | Collins Aerospace
Darpa Wants an Underwater GPS System for Seafaring Robots | WIRED
Underwater GPS (sorta) | Hackaday
Introduction - Documentation
Underwater GPS on a Remotely Operated Vehicle: Experience and Expertise - UC&NL