Not sure why you suppose it to be American. The two side-by-side guns forward look like a European WWI design, and the parkas suggest a country that knows how to dress for the cold. I think a Norwegian coast defence patrol vessel.ORIGINAL: GetAssista
This is a harder one. Some patrol craft. Mackay camo means around WWI and most certainly American.ORIGINAL: LargeSlowTarget
I permit myself a little hijack for another cammo ship:
Did they get that camo pattern from the back of a deck of playing cards?