A guy in Gilford has come up with an "amphibious" snowmobile (snow, ice, and water) that he's selling as a rescue vehicle. It was written up in the Union Leader in November:
http://www.unionleader.com/article/2...129213/-1/news
The embedded photos seem to be gone, but the article is still available. I did a quick search and found a promotional video on Youtube:
http://www.youtube.com/watch?v=fbYBJx1GmL4