From The Drone Girl:
Ready-to-use out of the box, underwater drones are the latest trend to come out of the robotics community. Instead of UAVs (unmanned aerial vehicles), these drones are typically referred to as ROVs, which stands for remotely operated underwater vehicles.
These underwater drones are typically tethered (to keep them from swimming too far away from you as well as to transmit data) to your boat or somewhere (or someone on land). The drones have cameras, making them excellent tools for underwater photographers, people who need to inspect structures underwater, scientific researchers, and even tour boat companies that want to show guests the world beneath the boat.
Welcome to drone day on the Adafruit blog. Every Monday we deliver the latest news, products and more from the Unmanned Aerial Vehicles (UAV), quadcopter and drone communities. Drones can be used for video & photography (dronies), civil applications, policing, farming, firefighting, military and non-military security work, such as surveillance of pipelines. Previous posts can be found via the #drone tag and our drone / UAV categories.