I have seen it. I was right up next to it. It was in Anacortes, WA for a few days for repairs
(possibly at Dakota Creek Shipyards, the aluminum/steel big builder
here in town). The bow of one of the pontoons was apparently torqued back like it hit the front of a wave too hard. There was no crew to be seen. An article appeared in the paper a few days later with no real information on who or what.
My thought is that was some DOD (Navy?) experimental/research vessel for open water
speed and possibly stealth. But the news article suggested it was private.
When it was here it had Delware registration
numbers on the bow of the pontoons, which are not there in these pictures. I suspect the pictures were after the repairs
as it looks like a new paint