I was watchin the last episode of ''earthsounds'' (docuseries that you can find on torrent) and they said to have used one of this with a microphone mounted under it to record better sounds from whales (because they travel a looooooot and not always on the same routes).

Autonomous robot solarpowered to catch better ocean data, pretty solarpunk to me :3

p.s. the series is nice even tho first 4 episodes have much more cool sounds; it's also interesting to see how hard it is to capture the sounds at the end of every episode

p.p.s. ye, it's not open source, by a company owned by boeing and probably also used for militar purposes so it's not perfectly as we would like it to be