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Garry Kozak
Garry Kozak, married with two children, has been employed 27 years by Klein Associates. David Trotter met Garry in 1983 when purchasing a Klein Sidescan sonar unit. Garry has, during 20+ years, willingly shared his knowledge on the application of sidescan sonar with David to the detriment of those shipwrecks discovered, and to the detriment of those shipwrecks in the "crosshairs".

David Trotter
David Trotter and the Undersea Research Associates (URA) team have been discovering shipwrecks in the Great Lakes since the 1970s. In a one-of-a-kind odyssey, the team has surveyed with Klein sidescan sonar over 2,000 square miles of Lake Huron. Due to the cost (money and time), it is an event unlikely to be duplicated. David has discovered 80+ virgin shipwrecks in the Great Lakes.

Barkentine H.P. Bridge
David Trotter and the Undersea Research Associates (URA) team have announced the discovery of the 163' sailing vessel H. P. Bridge. She is the most intact Barkentine to have been located in the Great Lakes. Built during the Civil War (1864) and sinking in a 1869 collision, she has been sitting upright on the floor of Lake Huron for 135 years with: all masts (three) standing, bow sprit in place, ornate eagle figurehead, bell mounted on the foredeck, access to the stern cabin and the captain's stove pipe top hat residing on the aft deck. The story of the discovery, exploration and history of the Great Lakes Barkentine H. P. Bridge has been produced in the video/DVD titled "Frozen In Time".