Regarding the phraseology I used, I’m a bit of a fraud, Srini. I don’t quite understand it. I only heard it, back in 1976 (and amazingly still recall it) from a scientist from the David W. Taylor Naval Ship Research & Development Center. He was visiting the naval station at Keflavik, Iceland, where I was stationed. His job was to help our anti-submarine warfare specialists use acoustic signals picked up from air-dropped buoys and sensors anchored to the sea floor to identify Soviet ballistic missile submarines by the sound produced by their propellers. The subs passed Iceland while transiting between their base at Polyarny and the U.S. east coast. He and I ran into each other at one of the base’s bars, and ended up spending a few evenings together. I’d talk air operations - I was an air traffic controller - and he’d talk propeller cavitation. I didn’t understand everything he said, but I found it fascinating.

By the way, you mentioned working on large bulk ships. Did you participate in the design, construction, or outfitting of Velamax vessels?