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NEAR-CILLI :
The employment or occurrence of, not the finishing positions of one
Enigma message, but of positions near these, as the outside indicator
of the next message; (cf. Cilli and Aitkenismus).
NEAR DEPTH :
(in machine ciphers). Two or more messages or parts of messages that
have been enciphered with all the wheels except one (or two) in the
same positions.
NEARNESS :
The occurrence or choice of a message setting near the outside indicator
of an Enigma message, so that after the former is enciphered the wheels
are in or near the positions required for enciphering the text, thereby
saving the operator the trouble of much further adjustment.
NETZ, n :
1. A form of W/T working in which two or more stations, each with a
call-sign and a corresponding frequency, work to each other, each
station using its call-sign and frequency for receiving purposes
only.
2. (in former Enigma-breaking). Any of 60 sets each of 26 differently
lettered double Foss sheets having holes punched in them corresponding
to females at distances of three (i.e. one set for each possible
wheel-order, and one sheet for each position of the left-hand
wheel - the positions of the other wheels being represented by the
co-ordinates of the holes). When the sheets of one set are super-
posed, staggered according to differences in the outside indicator,
the correct wheel-order and ringstellung are shown by the coincidence
of holes in several sheets.
NETZ, v :
(of W/T stations). To use the netz system of working.
NIGELIAN WHEEL ORDERS :
A series of wheel-orders used in certain G.A.F. Enigma keys, characterised
by the fact that it comprises only 30 out of the 60 possible wheel-orders.
NO-COLOUR :
(of Enigma messages). Not assignable to a particular key or colour;
unidentified.
NON-CARRYING :
(of addition, subtraction, etc.). Performed without transferring
multiples of 10, or any other modulus used, to the next figure on the
left as units as in ordinary arithmetic; cyclical or cyclically;
cryptographic.
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