Drones are coming to a sea near you. After the last few years’ advances in underwater digital imaging and videography, the next big thing is likely to be remote-controlled underwater drones.
The technology is already there, with professional salvagers and underwater explorers using remotely-operated robots for some time now. But the technology has thus far been prohibitively expensive, and has required quite a lot of skill and training to operate. But prices have dropped with this new generation of consumer drones, and usability is quite high.