No very important changes took place in the delimitation of the areas during the war, and the chart may therefore be considered generally representative of the organization.

Chart E shows the zones into which the Mediterranean was divided.
[Transcriber's note: Charts D and E are maps of the waters around the United Kingdom, and the waters of the Mediterranean, respectively, with patrol zones marked.] In December, 1917, the number of vessels of different classes actually appropriated to various areas is given on the next page in Table A for the British Isles and Table B for the Mediterranean.
TABLE A: AUXILIARY PATROLS IN HOME WATERS.
-- ----------------------------------------------------------+ Boom Defence Drifters, etc.

| -- ------------------------------------------------------+ | Boom Defence Trawlers.

| | -- --------------------------------------------------+ | | Patrol Paddlers.

| | | -- -----------------------------------------------+ | | | Paddle or Screw Minesweepers.