Just the fact that it's in a boat and there's absolutely no way to keep water from migrating under it would seem to make this a challenge at best. I was at a 3M demo last week and they were showing off their new rough wall vinyl which was pretty amazing but they even stated that the top edge of the installation should be sealed with silicone calk.
I have screen printed outdoor boat carpeting in the past with NazDar's DA series with catalyst with no problems but it is a definitely permanent application.