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 April 9, 1918 MJK
To Opnav Washington. Serial No. 6255
Prep. by N-3 SX D.R.
6255. Your 4641. In October last there were six Holland type submarines being assembled at Micolaev [Mykolaiv, Ukraine] , Black Sea, which were shipped from Van Couver [Vancouver]. The five shipped from United States in 1916 and assembled at Revel [Tallinn] and Helsingfors [Helsinki] have all been sunk. As far as known, there are no unassembled submarines at Petrograd. 17209 6255
Source Note: Cy, DNA, RG 45, Entry 517B.