ROV

Remote Operated Vehicles are remote controlled underwater robots used instead of divers for difficult operations, e.g. on great depth. More info.
Found on http://www.abc.se/~pa/uwa/glossary.htm

ROV

Abbreviation for remotely operated vehicle, usually a submersible tethered to a ship, with facilities for video, remote sampling by grabbing arms, and precise navigation
Found on http://life.bio.sunysb.edu/marinebio/glossary.rs.html

Rov

Abbreviation for remotely operated vehicle, usually a submersible tethered to a ship, with facilitie
Found on http://www.superglossary.com/Glossary/Science/Marine_Biology/
No exact match found