David Trotter through his "Great Lakes Adventure and Discover" lectures bring to life the Marine History of the Great Lakes. David is a renowned shipwreck discoverer, deep diver, author, photographer and lecturer. He and his associates have discovered and explored more than 80 shipwrecks since the1970's. Thousands of people have seen and enjoyed David's "in person" tales of adventure and exploration as presented through 25 plus lectures and visual programs which he has tailored to people of all ages.