ROV stands for "Remote Operated Vehicle". ROV's are not submarines by definition, since they are robots controlled by tether, by an operator stationed on a support vessel.
Remotely Operated underwater Vehicle , Recreational Off highway Vehicle ,
Figure out the weight of the device (ROV, submarine,etc), and then the weight of the water displaced. When they are equal, the device is neutrally buoyant. However, usually engineers create a ROV with a slightly positive or negative bouyancy, personally I perfer a positivly buoyant ROV because if you lose power or the tether is cut the ROV will ascend back up to the top. A more simple answer is that when the gravity & buoyancy are equal it is neutrally buoyant
the first ROV was developed in 1953
The 'Nereus' ROV, owned by Woods Hole Oceanographic Inst. has dived to 34,000 feet in the Challenger Deep, one of the very deepest parts of the Pacific ocean.
ROV means remotely operated underwater vehicle, so the pilot isn't in the machine. The pilot is sitting at a control panel on a ship nearby.
Remotely operated vehicle
The deepest ROV has been down to depths of around 6Km or 3.75 miles.
The ROV in the movie The Abyss was a Mini Rover ROV which was designed and built by Chris Nicholson of Deep Sea Systems in Falmouth, MA in 1984. It was 26 inches long and weighed 55 pounds. The Mini Rover ROV was the world's first small, low cost ROV. Its original price was about $28,000 at a time when the next lowest cost ROV was priced at $100,000.
NO
They are using ROV's which are like submarines. The unmanned ROV's have been very useful in the various efforts to contain or kill the well. A lot of folks have suggested putting something really heavy, like a submarine over the well. Remember, the oil is flowing through a pipe which connects the underground reservoir to the sea floor. The weight of the sub would buckle the pipe, destroy all seals in the wellbore and make it impossible to cement in the blow-out permanently. Similar result would happen by using explosives down the wellbore.
probaly by the control box
I believe it stands for Horace Lawson Hunley, who was the developer of the submarine.