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| T-45C TS INav-02
Introduction to INav and Voice Procedures
d.
Normally, two marker beacons are associated
Sg 20, fr 25
with an ILS approach, Outer Marker (OM) and
COMM Panel
Middle Marker (MM). However, Category II and
III ILS approaches may also have an Inner
Marker (IM) associated with the approach
(1) Outer Marker
(a) Indicates aircraft, if at appropriate
altitude, will intercept the glidepath
(b) Identified by a coded audio tone (three
dashes) and flashing blue cockpit
marker light
(2) Middle Marker
(a) Intersects the glidepath at approximately
200 ft AGL and identifies the approximate
missed approach point for Category I
approaches and Category C Navy
aircraft
(b) indicates a position approximately
3,500 ft from the landing threshold and
approximately 200 ft AGL above the
touchdown zone
(c) Identification is a coded audio tone
(dot dash dot dash) and flashing amber
cockpit marker light
(3) Inner Marker
(a) Indicates a point that an aircraft flying
a Category II or III ILS approach is at
the designated decision height on
glidepath between the MM and the
touchdown zone
(b) Aircraft is approximately 100 ft AGL at
IM if on glidepath and FAC
Page 2-34
(2-02) Original
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