Documentary Histories
WWI
All Navy Radiogram Concerning Recognition Signals
4/20/17
4 DN GH 35 Govt Fm Dn Washington Dc 20 Hp
Via New Orleans, La.
Naval Radio Pensacola:-
24 Alnav – To ships and stations with following code: The Secretary of War1 has issued orders to forts to consider hostile any entering men-of-war not showing recognition signal.2 These will be used always hereafter. Acknowledge 00021
Opnav:3
12 mid.
Source Note: C, DNA, RG 45, Entry 517. Someone has handwritten “Radiogram” and “April 21, 1917” on this message.
Footnote 1: Newton D. Baker.
Footnote 2: The U.S. Army was in charge of the nation’s coastal fortifications.
Footnote 3: That is, Office of the Chief of Naval Operations.
