This is going off-topic a bit, but ........When on the move these platforms invariably have a long tow (in fact so long that on occasions it's difficult to identify the much smaller tugs from a distance). The progress of these things is very slow, and warnings are transmitted to other shipping by Coastguard bulletins.
This monster passed us in 2010 and even with the perspective compression and haze you have to gawp at the size of the thing. I think it was off to the BP Gulf of Mexico disaster.