Lt.(jg) Cleveland V. Byram USNRF was CO of submarine chaser SC 23 during the war, and of submarine chaser SC 69 in 1919. This set of documents describes early post-war testing of the K-Tube listening device.

Scouting, page 1

Scouting, page 2

Scouting, page 3

Thanks to Dennis B. Ford, grandson of Lt. Byram, for submitting the document scans to The Subchaser Archives.