The blog MAKE has a neat little story about a man and his brother-in-law who have spent the last few years creating a homebrew remotely operated photographic submersible for about $100.  The men hope to use it to explore wrecks in Lake Erie.  Excerpt and link:

“I always wanted to be a marine biologist,” says Reinhardt. “I love the water, and ships, and watching Discovery Channel with the real ROVs exploring the Titanic.” Reinhardt and Fields built their homebrew ROV’s frame out of PVC pipe, and its transparent camera housing out of scrap quarter-inch-thick acrylic tube from the local plastics supply (milled to watertight tolerances on a friend’s lathe). They joined the two with simple but strong carpenter’s ratchet clamps, The B&W video camera was $29 from Harbor Freight, complete with infrared LEOs for night vision. power supply, and 80 feet of RJll cable.

http://blog.makezine.com/archive/2008/12/made_on_earth_the_eye_aqu.html?CMP=OTC-0D6B48984890

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