Secretary of the Navy Josephus Daniels to Rear Admiral Walter McLean, Commandant, Fifth Naval District
COPY OF TELEGRAM
Washington, D.C. April 15th, 1917
Commandant, Fifth Naval District,
Beginning April 16th, and until traffic lanes are swept of all sea going traffic must leave port just at dark. Also advise all sea going traffic to steer zigzag course until well clear of the coast. Also advise sea going traffic to approach all ports so as to get inside of the harbor patrol vessels during darkness. Advise seagoing traffic to run with no lights showing. Acknowledge Commandant, First to Eighth Naval Districts inclusive. 23015
Source Note: Cy, DNA, RG 45, Entry 517.