unsinkable?

[labii]

When I was in high school I had a friend with a 1974 17' steplift that is described in the 1971 catalog as having "built-in flotation" . That boat floated right to the bottom in the slip at the marina . The bildge pump went out and we had a large amount of rain and she went down . Unless you own a Whaler I would assume it will sink........