90. If in deciphering a message, you discover that it is an
Officer or Staff message, hand the cipher form to the officer handling
such messages. First complete the deciphering of the enciphered
groups according to Enigma General; in that process the addresses
and signatures and the rest of the enciphered text will come to light.
Relay by Wire of Received Radio Messages.
91. If the received Officer or Staff radio message, for further
deciphering, by the actual recipient, has to be relayed on the Naval
teletype network, then it is to be delivered to the teletyping station
in the following form.
a) Urgency sign.
b) Addresses, derived from the message.
c) Service label, "Geheim verschluesselt FT" ("Secretly enciphered
radio message" ) with time group.
d) The word "Offizier", or, as the case may be "Stab".
e) The indicator letter (omitting the dummy letters), e.g. Casar.
f) The four-letter groups enciphered according to Officer or
g) Signature, derived from the message.
If any groups were either missed or doubtful in reception, this
is to be noted in a special "supplement" ("Zusatz") to the signature
in g). To this supplement is to be added the signature of the re-
laying radio station, or Naval Communications Officer, or Command.
This message is to be sent as Secret Teletype (Geheimfernschreiben).
PRACTICAL CIPHER SERVICE.
96. In order to speed up the cipher service, ciphering groups are
formed of two men each (cipherer and copyist). Experienced personnel
can dispense with writing down the plain text in the "Book Groups"
column. Instead of this, the most practical procedure is as follows:
97. Ciphering. The first man (the cipherer) reads the message
through before enciphering it, in order to get acquainted with the
contents and to get used to the handwriting. After that he sets in
the Message Cipher. The cipherer and copyist are responsible for
the correctness of the setting. The cipherer then keys the message
in as regular a tempo as possible. The second man (the copyist)
reads the cipher letters which light up and he enters them on the
cipher form into the "Radio Groups" column (see paragraphs 58 and
66). Indicator Groups and Message Ciphers, with notation of valid
dates, are to be kept ready on the cipher forms.