63 Looks like a sailboat with hip tow.
A barge in international waters with hip tow.
If it was a barge in inland waters there would be a flashing yellow light on the barge and if it was a powerboat under hip tow it would show an all around white over the green/red.
Now, here's the kicker. I'm studying this right now for my OUPV test and answered without looking it up.... so I could be wrong.