Office of the Chief of Naval Operations, to Flag Officers
Leased Wire (Code translation) Washington DC
FROM : Opnav. March 16 1918
TO : C-in-C, Atlantic Fleet, Comcrufor. (Atlantic) Comdt. Amer Patrol Detach.; Flag, San Dom. Nav. Rad. St. Thomas, V.I., Navy Radio New Orleans Comdts 1-8th Nav. Dists., Com. 15th Nav. Dist.
To: Commandant 6th Naval District
From: Chief Naval Operations
MOST SECRET- From information gained by contact with enemy cruising submarines, one may be encountered anywhere west of 40th west No lights should be carried except as may be necessary to avoid collision and paravanes|3| should be used when practicable and feasible – Acknowledge
Commander in Chief (Atl Fleet)
Commander Cruiser Force (Atlantic)
Commander American Patrol Detachment
Flag San Domingo
Navy Radio S. Thomas V I
Comdt. 1st Nav. Dist.
2nd " "
3rd " "
4th " "
5th " "
6th " "
7th " "
8th " "
15th " " 13016
Source Note: Cy, DNA, RG 45, Entry 517B. There are notes at the bottom of this copy of the cable: “Referred to Comdt. Naval Station, Pensacola V.F.Nelson” and “Received by mail 17 May, 1918.”