Vice Admiral William S. Sims, Commander, United States Naval Forces Operating in European Waters, to the Office of the Chief of Naval Operations
Subject Copy. File No. <40/12/2>
Cablegram Sent 7 June 1918 RES
To Opnav Washington Serial No. 9191
Prep. by CS NCT D.R.
9191. Your 6715. The opinion expressed in my 8591 regarding condition of Azores submarines was based on statement by Lieutenant Commander L. D. Causey who had just come to London from the Azores and was entirely familiar with the condition of the boats. He unhesitatingly and without reserve stated that the boats were in just as good condition when he left the Azores as they had been when they left the United States. They cannot have deteriorated seriously in the short time elapsing since he left the Azores. Written reports from Rear Admiral Dunn do not entirely corroborate his cabled report that the boats are in such condition that they cannot successfully operate against the enemy, but it is undoubtedly the fact that the boats are not as reliable as some of the late types, and have certain inherent defects in design which cannot be remedied except by extensive alteration. It would appear desirable in view of limited repair facilities at the Azores that the K-boats be replaced there by boats of more recent design and less subject to breakdown. 21207. 9191.
Source Note: Cy, DNA, RG 45, Entry 517B.