ROVs are tethered underwater vehicles. Like submersibles, there are used in areas of high pressure. They are remote control operated and are connected to the submersible. ROVs are used to discover new sea animals in high pressure, and dark areas.
The last few months have been very exciting in the quadcopter market as industry heavyweights including DJI and Parrot have each introduced new product lines offering professional-grade features for a fraction of the cost associated with these same features a mere six months ago. Enhanced GPS functionality, improved firmware, and better cameras are just a few of the improvements pilots can expect from the latest generation of flying cameras.