As others have said, use a marine title firm. I can highly recommend these people, based in Seattle.
Pacific Maritime Title
You say the boat is far away, but everything is relative. If its in the USA or Canada then its pretty close to you, really. I was in Australia when I bought my boat in Washington. And I simply cant imagine not being there in person when it counts. I would encourage you to find a way to be there either at survey or settlement, or both. Some travel costs are better then regret.