War instructions for British merchant ships
By: Trade Division, Naval Staff, Admiralty
Series: C.B -- no. 415
Publisher: [The Division]
Published: 1917
Place of publication: London]
Language: eng
Number of pages: 100
Subjects: World War, 1914-1918; British Naval operations; Navigation; History; Merchant marine
Notes: "Confidential."

"This book cancels C.B. 237, Addenda, and all previous issues of the printed instructions for British merchant ships issued by the Trade Division, Naval Staff, Admiralty"--Title page verso.

Addendum no. 1, C.B. 415A, 1917.

Addendum no. 2, C.B. 415B, 1918.