Over the course of four years, MAHS researchers investigated the wreck of U.S. Navy PBM-3
(BuNo 6672) located in the Choptank River, on the Eastern Shore of Maryland. The work was conducted on behalf
of the Underwater Archeology Branch of the Naval Historical Center and the Maryland Historical Trust (MHT).
The Martin Patrol Bomber ("PBM" or "Mariner") was a twin-engine seaplane that was developed and
built in the 1930s and 40s for the U.S. Navy by the Glenn L. Martin Aircraft Company of Baltimore, Maryland.