This isn't a water hobbyists forum, nor one for all manner of remotely operated vehicles, so it's a bit optimistic to assume many people here will know "ROV" as a remote controlled submarine. Fact is, most of us cannot, from the title, figure out if we're interested, nor from skimming the first six (!) pages of a long article. Explaining ROV once at the beginning would, I dare say, not have impacted the enjoyment of underwater professionals very much, but saved me and most others on this forum some time figuring out if I want to figure it out.