Boat fires in marinas
are almost never just the boat that caught on fire. I have seen two in our marina and boats on either side, two boats away, got either destroyed or significant damage. And the fumes from a fiberglass
boat fire can be deadly. Don't get downwind of it. Not to mention gas boats and propane
explosions. I would be likely to try to help if I could but I would take extra care and if I didn't think it was safe I would not do it. I watched the fire crews and their boats keep a healthy distance. The other problem is that boat firs are exceedingly hard to put out - even with foam.
And never, ever, open up a closed door with a strong internal fire going. Flashes are usual with the new fresh air. Many people have died from that, including on their own boats.