A lot of pilots got their carrier training on converted paddle wheel steamers in Lake Michigan during WWII. With lots of inexperienced pilots practicing carrier takeoffs and landings, you're bound to end up with a few planes on the bottom of the lake.
The ships they used for the training were actually pretty interesting:
http://en.wikipedia.org/wiki/USS_Sable_(IX-81) and
http://en.wikipedia.org/wiki/USS_Wolverine_(IX-64)