it is painted navy grey, not coast guard white.... the size is not truely gargantuan so it is probably just a test article, if the bow opens,then it is general purpose cargo, but ic could also be for very long range marine opps, survalence, keeping things edgy stuff

They don't do well in open ocean which is why only saw them in Caspian Sea. My understanding is that they need to fly a certain distance above the waves to keep from hitting them. When the waves are big, this pushes them close to ground effect limit.

My guess is that they would be okay for confined seas like Mediterranean. Or uses where they didn't need to keep to schedule.