AUVSI Surface Vehicle Competition
On another note, I was curious about the legal issues surrounding operating autonomous underwater vehicles and I found this pdf which considers the current regulatory issues. The majority of the operational permit issues seem to involve harassment or accidental injury to aquatic wildlife, often due to the use of sonar.
This information may not be up to date but it was the best I could find, IANAL.
XUAV Talon build thread (planned with PIXHAWK autopilot)
54 minutes ago