Yes - that's something I've come across frequently in my line of work.

Very true, that seems to be all a part of the game with the offshore vessels here. Some odd loopholes and exemptions allow vessels that would usually be well over 100 GT in international measurements to list as only 98 or 99 GT by US measurement, and thus escape the need for IMO registry.

Thanks Kyle. I just looked at ABS and - obviously - she's already been deleted from there. It looks as though she is about 35- 40 metres LOA so she probably never met the international 100 gt threshold for an IMO number.

Phil,
Not that I've been able to find, she's a tough one to track as she's been deleted off the US registry. All I found is that she was built in 1978 by Eserman Shipyard.

Is there an IMO number for "Mr Clean" ?

Andrew, I would hope it isn't, seeing as I plan to go photograph MR. CLEAN III this afternoon during her visit to Seattle.

The vessel pictured here is "Mr. Clean", not Mr. Clean III. Mr. Clean III is still active and in service.