The following were housed with the Duty Officer (D.O.)
(i) The Runs Registry, which organised jobs for Robinson and Colossi.
(ii) The Tapes Registry, which organised jobs for the Tunny Rooms.
(iii)The Logs Registrar, who maintained liaison with the Joint Registry
(Rooms 11 and 12) and the T-Registry (which was the Block H branch of the
Joint Registry - see Ch.34) see also Fig.37 (I).
In addition there was an H registrar who was effectively the Block H
representative of the Runs Registry.
The Runs and Tapes Registrars issued chits with every job ordered. These
chits contained accurate descriptions of the job required and were returned with
the tapes when the job wascompleted.
When the Colossus tapes were returned from the Tunny Room the T.R. checked
that they were correctly marked, had an adequate join, and stop and start signs in
the correct place. To ensure this the first few letters of the tape were checked
with those on the Ops. card. The tapes were then passed to the Runs Registrar.
After a successful setting job the tapes were returned to Ops with a decode
check or de-chi check and Delta-D letter count. If the job was partially
successful a Delta-D letter count using as many wheels as possible was provided.
When a dossier was given to the D.O. he ordered one of the following: Further
runs, Decode, De-chi, or Abandon and returned the dossier to the runs Registrar.
The Registries had several additional jobs. For example the Tapes Registrar
kept an index of Delta-X5's so that any repetition of the same set of wheels could
(b) Robinsons and Colossi
In June, 1943, when there was only one Robinson available, each message