David Trotter is a renowned shipwreck discoverer, deep diver, author, lecturer and photographer. In over 20 years of diving, he has been the first to locate, identify and document over 60 Great Lakes shipwrecks. His shipwreck discoveries and programs have been featured on television and in newspapers throughout the U.S. and Canada. He has written several articles on Great Lakes shipwrecks that have been published in historical journals and national scuba diving publications.

Through Undersea Research Associates, founded to present the Great Lakes community with an electronically sophisticated means of underwater search and survey for archeological and commercial purposes, he presents visual underwater time capsules of marine history. Utilizing state-of-the-art side scan sonar, with outstanding skilled operators, the organization offers high resolution bottom profiling at depths to 1,000 feet, underwater site survey and underwater photographic documentation. 

Dive To The Philadelphia


The Philadelphia, a 236 foot steel hulled propeller, met her fate on November 7, 1893 in a collision with the steamer Albany.  This narrative examines an outstanding sport diving shipwreck and the tragedy that brought her to the floor of Lake Huron. 

The Philadelphia rests in an upright position with cases of canned goods, bucksaws, hardware and coal lying in the cargo holds.  Her deckload of cast iron stoves is still aboard and many of her hand tools are still visible on the deck.  Mysteriously, 24 of the 47 men perished in the fog, making this the worst Great Lakes disaster of 1893.

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