VOLUME I Multinational Maritime Tactical Instructions and Procedures

MTP 1(D), Vol. I
6352 GATEWAY UNIT
In group working with more than one TDS system (i.e., Link 11) a gateway unit is assigned. A
gateway unit is a participating unit that is operating on both links and is responsible for transfer of selected
track data between the two link systems. The transfer can be manual or automatic.
6353 LINK BROADCAST UNIT
For Link 11 and Link 14, a broadcast unit may be assigned. This unit will transmit data from his TDS
system to other units, who will only receive this data but not answer or retransmit. The receiving units will
either plot this data manually or automatically.
6354 GRID REFERENCE UNIT (GRU)
The GRU is the unit designated by the OTC to maintain the OTC’s geographical reference point.
a. The GRU is responsible for:
(1) Carrying out general grid locks as ordered by the AAWC/FTC-A.
(2) Acting as reference for individual grid locks where possible.
(3) Monitoring the positional accuracy of transmitted data by link participating units.
(4) Ensuring his data systems’ navigational input is both up-to-date and accurate.
b. The GRU should be chosen by the OTC on the basis of:
(1) Position in the force, ensuring:
(a) Good link communications.
(b) Greatest track density coverage.
(2) Large and accurate track reporting capability.
(3) Accurate navigational facilities.
(4) Reliability of link participating unit.
6355 — 6359 SPARE
6360 PROCEDURES
6361 GRID LOCK PROCEDURE
a. Grid Locks. The GRU executes grid locks on completion of the insertion of the DLRP into the
various TDS, or after changing the DLRP. Grid locks are also executed periodically to reduce errors in grid
reporting.
(1) Individual Grid Lock (Codeword RONSON). Individual grid locks are undertaken:
(a) When a unit joins the force and enters the net.
6-26 ORIGINAL