Bert Ho National Park Service Submerged Resources Center No description specified. 1-2 (2 Records) Documents Guns, Shipwrecks, and Investigations of Spanish Colonial Trade and Privateering in the 17th Century: The Chagres River Maritime Borderland, Panamá (2015) Sunken Aircraft Archaeology Within U.S. National Parks: Lessons Learned from the Documentation of a Submerged WWII B-29 Super Fortress (2014)