RELAYING OF MESSAGES.
Certain Outstations are NOT working under Clandestine conditions. The plan names of these Stations are given in Appendix A.

It is frequently necessary to relay messages from one of the Outstations to another via the Homestation.

Such traffic will fall into three categories:

- Messages to be relayed by the Homestation receiving them.
- Messages received at one Station to be relayed by another.
- Multiple address messages which are a combination of those mention above.


CATEGORY A.

All messages in this category will be relayed direct by the Station receiving them.

The Duty Signalmaster at the Station will be responsible for obtaining from HQ Signal Office new Line numbers for each Outgoing message.

It will be the duty of the Duty Signalmaster at the station to ensure that a clear copy has been received before transmission.

Apart from the limitations imposed by the fact that some of the Outstations share channels and some work on fixed sked, the Outstations are available to the Homestation for as long as is necessary to ensure the Homestation obtaining an accurate and uncorrupt copy of every message.

When a clear copy has been received it will be deciphered re-enciphered in addressees code and retransmitted with minimum of delay.

A copy of the message, when cleared to the addresses(s) will be teleprinted to HQ Signal Office showing the double line number and addressee(s) as cleared, e.g.

A.1234/4567
FROM VARICOSE
TO CLDDD UPPERMOST
INFO CLDDD VALIDATE


CATEGORY B.

Messages in this category will be deciphered and teleprinted to HQ Signal Office by the receiving Station.

HQ Signal Office will teleprint to the relaying Station, treating the message as an ordinary Outgoing message, except that it will show the double Line number, e.g. In and Out Serial Numbers, e.g.

OUT A.4321
IN    B.1234

The relaying Station, in above example, Station 53A, will inform the receiving Station, by telephone, when the message is finally cleared to addressee(s) and the receiving Station, in above example Station 53B, will not clear their registers until this information is received from the relaying station.

It will be the duty of the Duty Signalmaster at the receiving Station to ensure that a clear copy has been received before teleprinting the message to HQ Signal Office.

The final clearance of the message by the relaying Station will be shown in the two hourly traffic returns and HQ Signals Officeregisters will be cleared in the normal way.

In order to reduce delays to a minimum, messages teleprinted to HQ Signals Office for relay will bear the word RELAY, in the same position as the word FLASH is used at present. It will be the responsibility of the Duty Signalmaster at the receiving Station to scrutinise all relay messages and ensure that the word RELAY is inserted.

Upon receipt at HQ Signals Office of a relay message the teleprinter operator will pass the message direct to the Duty Signalmaster, who will be responsible for ensuring that it is passed to the relaying Station with the minimum of delay.


CATEGORY C.

Multi Address messages may be received for relay to an Outstation controlled by the receiving Homestation and to an Outstation controlled by an other Homestation.

Such messages will be cleared by a combination of the procedure for Category A and B, e.g.

A message received

FROM VALIDATE
TO UPPERMOST
INFO VARICOSE, EUPHEMIA

This message would be cleared direct by Station 53A to UPPERMOST and VARICOSE and should be teleprinted to HQ Signals Office as:

A.1234/5678/9
FROM VALIDATE
TO CLDDD UPPERMOST
INFO CLDDD VARICOSE
INFO EUPHEMIA

Note: The addressees to whom the message has NOT been cleared will be shown on a separate line from the cleared addressees.

The message will then be teleprinted to Station 53B in the same form but with double line numbers, e.g.

B.4321/A.1234
FROM VALIDATE
TO CLDDD UPPERMOST
INFO CLDDD VARICOSE
INFO EUPHEMIA

A message received from a detachment in the field for action this HQ and info other detachments in the field, e.g.

FROM VARICOSE
TO WATERMARK
INFO VALIDATE UPPERMOST EUPHEMIA

This would be teleprinted to HQ Signal Office as:

FROM VARICOSE
TO WATERMARK
INFO CLDDD VALIDATE UPPERMOST
INFO EUPHEMIA

Messages for relay to Paris - The teleprinter circuits from HQ Signals Office to Paris serves:

SPU.24. old W/T plan name CHANTILLY RED, telegraphic address CHANTILLY
SPU.26. old W/T plan name CHANTILLY RES, telegraphic address CHANTILLY
D GER, old W/T plan name GAIETE

(The W/T plan CHANTILLY RED now working to Centre 20 has been renamed Centre 20)

Any messages received for relay to above units will be deciphered and teleprinted to HQ Signals Office in clear.

At HQ Signals Office they will be re-enciphered and cleared over the teleprinter circuit in the normal way.



CORRECTIONS.

Should it not be possible to obtain a clear copy of a message before the Outstation closed down, due to any of the conditions stated in para III, sub-para 3 above, message will be relayed with corruptions and corrections obtained as soon as it is possible to contact the Outstation again. The corrections will be forwarded as service messages at the earliest opportunity. the form of these service messages will be as laid down in letter 1/65 dated 23 January 1945. (Not to all addressees)

Corruptions may occur in either the first transmission, i.e. Outstation to Homestation or relay transmission i.e. Homestation to Addressees.

In order that all concerned shall know that corruptions in the first transmission are being dealt with, the mutilated group or groups will in each case be preceded and followed by the code Group CTFFF (meaning corrections to follow). This code group will always be enciphered with the message.

Upon receiving such a message, the addressee will know that there is no need to ask for corrections.

Should there be no corruptions in the message which are not preceded and followed by CTFFF, the addressee will know that they occurred in the relay transmission and will therefore ask for corrections.

It will be the responsibility of the Signalmaster at the receiving Homestation to ensure that CTFFF is inserted as required before the message is teleprinted to HQ Signal Office.



APPENDIX "A"

53A

SCOPUS
BENTO
NORLAND
NEVIN
NELSON
NITON
NOKE
NORDEN
NOLTON
NOCTON
NORHAM
NORTHHILL
CENTRE 2C
MORAY









53B

EUPHEMIA REAR
EUPHEMIA ADV
ANTWERP
BRUSSELS
DUXFORD
BACARDI
NORTHAW
BREDA



                                                                   





                                                                    
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