VOLUME I Multinational Maritime Tactical Instructions and Procedures

MTP 1(D), Vol. I
4172 SUBMARINE BROADCAST
a. Submarines receive message traffic on an accountable broadcast transmitted by the
SUBOPAUTH. How the broadcast is to be used for command and control of units operating with a task
group should be coordinated with the SUBOPAUTH prior to coordinated submarine-task group
operations. The information transmitted on the broadcast must be prioritized and coordinated with the
SUBOPAUTH and SOCA. Generally, those messages containing operational level tasking (e.g.,
SUBNOTEs) will have first priority, and those for tactical level tasking and coordination will have second
priority. Messages generated by the task group may be edited to fit on the broadcast. Use of
communications ZPW (automatic cancellation) procedures applicable to perishable information will
allow early removal of these messages from the broadcast and significantly reduce overall traffic loading.
NOT RELEASABLE
b. Lead-Time Requirements. Depending on its role and communication schedule, lead time
required to ensure submarine receipt of tasking, coordinating instructions, intelligence, etc., can be
significant. Unless the submarine is maintaining a near continuous communications connectivity with the
SOCA, plans should be based on worst-case message delivery time and maximize use of scheduled
submarine broadcast cycles.
NOT RELEASABLE
Table 4-2 — NOT RELEASABLE
c. Maritime Rear Link (MRL). Establishing a MRL between the OTC/SOCA and
SUBOPAUTH is essential for most operations and will greatly simplify coordination of submarine tasking
and waterspace management requirements.
d. NOT RELEASABLE
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