VOLUME I Multinational Maritime Tactical Instructions and Procedures

g. Approach Corridor. The approach corridor is usually established on a line between the
entry/exit gate and the force/disposition center. If the force center cannot be determined by the aircraft’s
radar, the corridor will be on a line between the entry/exit gate and the PIM position. The inner boundary is
determined by the ISR. The approach corridor width is normally 5 nm either side of the line. Depending on
the mode of promulgation the corridor may be fixed geographically or move in the following manner (see
Figure 6-3):
1. If the entry/exit gate and ISR are established relative to force/disposition center, the corridor orientation
and dimensions will not change but the entry/exit gate and the corridor will move with the
force.
There may be occasions when tactical considerations dictate deviation from the direct route from
entry/exit gate to the force/PIM position. In which case, the routing must be included in the OTC’s
OPGEN/OPTASK updates or agreed to between the shore ADC and the OTC. When establishing
approach corridors, the OTC must consider the communications that will be available for joining and
marshalling, the direction of the friendly bases from which aircraft might come, threat axis, areas in which
support aircraft will be employed once on patrol, location of TOMCAT and AEW pickets in a large
disposition, and AAW coordination such as MEZ and FEZ.
h. Identification Safety Point (ISP). When the gate is not within the radar cover of the ships or
when two-way communications are not established between the ACUs, the ISP is the point at which
aircraft on joining the force will attempt to establish two-way communications with the ships and
commence identification procedures. Unless otherwise promulgated the ISP will be a position at 150 nm
from ZZ on a direct line between the in-use gate and ZZ. There may be occasions when tactical
considerations dictate deviation from the direct route from gate to ZZ. In which case, an ISP may be
included in the OTCs AAW update or agreed between the shore ADC and the OTC, otherwise the ISP need
not be promulgated.
6417 IDENTIFICATION/RECOGNITION PROCEDURES
Tentative initial identification/recognition of friendly aircraft may be assumed when an aircraft,
showing the proper IFF/SIF code, enters and settles down on the heading of the designated approach
corridor or sector. Positive identification/recognition will be considered as established when an aircraft
has been visually sighted and recognized by CAP, other known friendly aircraft, or a surface ship. If not
sighted, positive identification/recognition may be assumed if at least one planned IFF/SIF change or
identity maneuver has been made. The following self identification procedures are established:
a. NOT RELEASABLE
MTP 1(D), Vol. I
6-41 CHANGE 1