Commodore Guy R. Gaunt, British Naval Attaché, Washington, D.C., to British Admiralty
[late May 1917]
60. Following from Commodore Gaunt.
The Scientific Commission which is investigating the method of combating submarines has asked me following question I will be glad of as early and (?group omitted) an answer as possible.
1. Has any method been tried of placing (?listening) devices in quantity at bottom of North Sea?
2. Has any workable magnetic detector been developed?
3. Has a mine been developed for use in large numbers which is dangerous to submarines and not to surface craft?
4. How effective are seaplanes as offensive instruments against submarine both for detection and offensive?
5. Can you introduce us status Braggs Scientific Sound devices?
6. What is most effective method of destroying a submerged submarine once it is discovered?
7. Do Germans use non magnetic steel in submarine construction?
Source Note: D, Uk-KeNa, Adm. 137/655. The document is undated. The editors believe it was sent in late May 1917 based on the questions asked and its location in Adm. 137/655. Following the document is a routing list which reads:”1.S.L./D.O.D./D.A.S.D.” In order that is: First Sea Lord Adm. Sir John R. Jellicoe; Director of Operations Division RAdm. Thomas Jackson; Director of Anti-Submarine Division RAdm. Alexander L. Duff.