and the Hackerbot Labs team are building an autonomous boat capable of doing sonar surveys of dive sites:
Hackerboat
An autonomous boat of unusual size
Pierce recently wrote about the latest news from the project:
Hackerboat Progress
Since the last update, we’ve gotten in the water one more time (in late July) and we’ve made some substantial design changes. First off, here’s a video of my talk at Toorcamp that Alex was kind enough to put together