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APPENDIX 1 OF VOL
IV
1982-03-05
MESSAGE SUBSYSTEM
Page
#
TECHNICAL PROPOSAL
2. O̲P̲E̲R̲A̲T̲I̲O̲N̲A̲L̲ ̲P̲R̲O̲C̲E̲D̲U̲R̲E̲S̲
Implementation of the MSF operational procedures will
be based on the experience that Christian Rovsing A/S
has gained from implementation of similar ommunication
systems. During the design of CAMPS, for example,
Christian Rovsing A/S has conducted a number of reviews
with SHAPE operational staff to ensure effective and
easy to use man-machine interfaces and operational
aspects.
The objective for the MS design have been: to build
a secure and reliable system; to provide the system
with great modularity and flexibility in both software
and hardware; and to retain as much commonality with
other NATO systems as possible.
This section decribes the essential operational procedures
performed by the proposed Message Subsystem. Further
description of the function level is given in section
4.2 of this appendix.
2.1 B̲R̲O̲A̲D̲C̲A̲S̲T̲ ̲O̲F̲ ̲M̲E̲S̲S̲A̲G̲E̲S̲
The methods and procedures for the operatin of the
CROSSFOX Broadcast will be implemented in the MPF in
accordance with the relevant paragraphs in ACP127 Supplement
1 as listed in the IFB. Below, these operational procedures
will briefly be described. For detailed information
please refe to section 4.2.2 of this appendix.
2.1.1 T̲r̲a̲n̲s̲m̲i̲s̲s̲i̲o̲n̲ ̲o̲n̲ ̲t̲h̲e̲ ̲B̲r̲o̲a̲d̲c̲a̲s̲t̲
The MPF will automatically broadcast incoming messages
destined for relay and locally generated messages in
accordance with the message routing information and
the channe assignment.
The supervisor will have facilities for channel assignment
i.e. specifying which of the ships, or other authorities
copying the broadcast, shall be associated with each
channel ofthe broadcast.
The format of the messages to be transmitted on the
broadcast will be in accordance with ACP 127 supp.
3 with format lines 1 to 4 and 7 and 8 removed.
Each message destined for transmission on the broadcast
may, if specified by te supervisor, be subject to vetting
and/or screening by an operator before its entry into
a broadcast channel queue.
The MPF will have facilities for minimimizing transmission
on the broadcast taking into account that a given ship
may be listenin to more than one Broadcast channel.
2.1.2 D̲i̲s̲s̲e̲m̲i̲n̲a̲t̲i̲o̲n̲ ̲o̲f̲ ̲t̲r̲a̲f̲f̲i̲c̲ ̲c̲o̲n̲t̲r̲o̲l̲ ̲I̲n̲f̲o̲r̲m̲a̲t̲i̲o̲n̲.
The MPF will have the facilities for transmitting service
messages informing of broadcast channel assignment
and disseminated message traffic. The followng information
is transmitted:
o Channel allocation list, indicating to ships and
other copying authorities the assignment of Broadcast
Channels. This service message is sent via the
Broadcast service channel.
o ZOU list will be routed to supevisor specified
authorities giving the routing information. This
service message will be compiled and transmitted
at 23.59 each day or at the supervisors discretion.
o Channel frequency change, notifying the ships of
changes to the frequency of the broadcast channels.
o Traffic check list, including an identification
of all messages transmited on a channel basis will
be transmitted periodically on each channel.
2.1.3 R̲e̲t̲r̲a̲n̲s̲m̲i̲s̲s̲i̲o̲n̲ ̲o̲n̲ ̲B̲r̲o̲a̲d̲c̲a̲s̲t̲
Ships can send requests for retransmission via the
ship-to-shore subsystem, and the MPF will automatically
retransmit the required messae. Also the supervisor
will have the facility to request retransmissions.
The MPF will provide for re-runs of traffic. The supervisor
will specify the level of precedence above which messages
shall be subject to re-run. The above procedures ar
subject to modifications as introduced by expiration
time and message screening and vetting.
2.1.4 P̲r̲o̲c̲e̲d̲u̲r̲e̲ ̲f̲o̲r̲ ̲C̲r̲y̲p̲t̲o̲ ̲H̲a̲n̲d̲l̲i̲n̲g̲.
To allow the accomplishment of key change procedures,
the supervisor can suspend broadcast traffic in an
orderlyfashion for a specified period of the day.
The MPF will support the supervisor in transmitting
the proper service messages and in the execution of
the message transmission procedures.
Initialization and synchronization of the crypto's
will be cntrolled from the MPF through a crypto control
box. The MPF will use V24 lines to request synchronization
and receive a ready-to-transmit-message.
2.2 S̲H̲I̲P̲-̲T̲O̲-̲S̲H̲O̲R̲E̲ ̲M̲E̲S̲S̲A̲G̲E̲ ̲H̲A̲N̲D̲L̲I̲N̲G̲
The processing of the Ship-To-Shore message traffic
implemented in the MPF will support the operational
procedures laid down in the relevant paagraphs of ACP127
Supp. 1, as listed in the IFB. Below a short description
of the operational procedures will be given. For further
details please refer to section 4.2.1 of this appendix.
2.2.1 R̲e̲c̲e̲i̲p̲t̲ ̲o̲f̲ ̲M̲e̲s̲s̲a̲g̲e̲s̲ ̲o̲n̲ ̲S̲h̲i̲p̲-̲t̲o̲-̲S̲h̲o̲r̲e̲
When ships
