The importance of closures in a menu is illustrated by the
following abbreviated letter-closure table.
Fig. 11. Abbreviated Letter Closure Table.
SETTING UP MENU ON BOMBE.
The first step in setting up a menu on a bombe is to insert the
proper wheels in the enigmas. To assist in this operation the
following color code for painting The wheels is used.
1. - Red
2. - Maroon
3. - Green
4. - Yellow
5. - Light Brown
6. - Blue
7. - Black
8. - Silver.
the next step is the plugging of the bombe. Certain general
rules have been adopted for plugging. On outside links the inner end
of the enigma is patched to the outlying letter. The following menu
will be used to illustrate plugging.
Fig. 12. Typical Menu.
For instruction in plugging this menu see the representation of the
jack panel in the rear of the bombe (Fig. 13) On the next page.