by Juliana Moxley
Diving is not the only way to get an in-depth look at the mysteries beneath the surface of the Great Lakes.
Lasers, underwater robots and other innovative technologies are simplifying the discovery and research of hundreds of shipwrecks at the bottom of the Great Lakes.
Thunder Bay National Marine Sanctuary, a part of the National Oceanic & Atmospheric Administration (NOAA), is a 4,300-square-mile shipwreck sanctuary in northwestern Lake Huron near Alpena, Mich.
http://greatlakesecho.org/2014/11/11/explorers-map-great-lakes-shipwrecks-with-lasers-sonar-photo-sleds-and-robots/
