(CONTAINED IN THE POCKET AT THE END OF THE BOOK)

A. Approach Areas and Typical Routes.

B. Typical Approach Lines.

C. Barred Zones Proclaimed by the Germans.

D. Patrol Areas, British Isles.

E. Patrol and Minesweeping Zones in the Mediterranean.

F. Showing French and British Ports within Range of the
German Bases at Ostend and Zeebrugge.




To

The Officers and Men
of our
Convoy, Escort, Patrol and Minesweeping Vessels
and their
Comrades of the Mercantile Marine

by whose splendid gallantry, heroic self-sacrifice, and
unflinching endurance the submarine
danger was defeated