This folder contains correspondence, test reports, and other documents relating to Edison's experimental work for the U.S. Navy, which drew to a close in 1919. Included are reports by John A. Hanley on submarine detector experiments aboard the USS Hauoli, Sachem, and Felicia, along descriptions of those vessels and some instrument recording test strips. Also included is correspondence with Lt. Cdr. Richard B. Coffman of the Third Naval District about experiments with radio sets and the assignment of Navy chief electrician John L. Sweeney and radio operator Howard G. G. Nelson to assist Edison with those experiments.

Approximately 40 percent of the documents have been selected. The unselected material includes copies of Navy technical specifications, documents relating to shipping, duplicates, and items not pertaining to Edison personally.

Related items can be found in E-19-60 (Radio); in the Naval Consulting Board and Wartime Research Papers in Part V of the microfilm edition; and in the Edison Wartime Research Reports (Charles Hummel Collection) in the digital edition.