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Amtrac Amphibious Tractor
Anne Wright diving on an Amtrac amphibious tractor as part of an effort to generate high-resolution, in-depth documentation of this important cultural resource, one of the few currently known underwater relics from the 1944 invasion of Guam.
Credit

Image courtesy of National Park Service via Guam: A Biogeographic and Maritime Cultural Landscape Exploration of a WWII Amphibious Battlefield.