Vice Admiral William S. Sims, Commander, United States Naval Forces Operating in European Waters, to the Office of the Chief of Naval Operations
Chronological Copy. File No.
Cablegram Sent February <22> 1918
To Opnav Washington Serial No. 4234
Prep. by D.R.
V E R Y S E C R E T
4234. Your 3029. First cruiser submarines will probably be commissioned March. Possibly one or two already in commission. No reliable information concerning <their> plans of operation. Best information indicates two types of cruiser submarines, approaching completion or completed. Four of 2800 tons, 16 knots surface speed, and eight of 3000 tons, 18 1/2 knots. No information about submarines of greater displacement. 02522.
Source Note: Cy, DNA, RG 45, Entry 517B. The date is a handwritten addition and corresponds to the date stamp at the end of the document.