Components and Characteristics of the Instrument Landing System (ILS)
T-45A UJPT & E2-C2 INav-04
2.
DME from a separate facility may be used within Terminal
Instrument Procedures (TERPs) limitations:
a.
To provide ARC initial approach segments
b.
As a FAF for BC approaches
c.
As a substitute for the OM
NOTE: The DME of a separate facility is not, by FAA (AIM)
definition, authorized for use inside the outer marker inbound on an
ILS approach.
C. Cross Radials
1.
May be generated by VOR or TACAN stations
2.
No difference in the procedures used on ILS/LOC approaches than
any of the other types of approaches. However, the cross radial
generated from a VOR station would require the ILS to be off tuned
on final
NOTE: Off-tuning the ILS frequency for VOR cross radial fix
identification after final is not an acceptable option. TACAN cross
radial identification poses no problem.
3.
If DME is associated with ILS/LOC approach, use the DME as the
method to identify the aircraft position along the FAC
D. Compass Locator
Although the T-45A is not equipped to use a compass locator, the
following information is provided to give you a basic understanding of
the system.
1.
Low power transmitter which emits an omnidirectional signal in the
ADF range
2.
Most often situated at MM or OM sites
3.
Most transmitters have less than 25 watts of power and a range of
at least 15 nm. Some locations have up to 400 watts, and are
used as OM compass locators and may carry Terminal Weather
Broadcast (TWEB) information
4.
If used as a Locator Outer Marker (LOM), the beacon will transmit
the first two letters of the localizer identifier. If used as the Middle
Marker (MM), the beacon will transmit the last two letters of the
localizer identifier
(6-99) Original
Page 4-13
Previous Page
