Instrument Landing System (ILS) function and equipment

T-45C TS INav-02

Introduction to INav and Voice Procedures

DGRO mode allows a pilot to enter a magnetic

heading. That heading is automatically refined

(corrected) as long as the system has a valid GPS

satellite connection

NOTE: If GPS is not available, the T-45C will

continue to use the pilot-set heading, not

attempting to refine it.

The T-45C does not directly “sense” magnetic

heading. Instead, the GPS calculates true north,

applies an earth-model algorithm to derive magnetic

north, then, orients the INS

Instrument Landing System (ILS) function and equipment

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Lesson Organization

NOTE: The ILS approach system is made up of three

functional component; guidance systems, range systems,

Fig 2: FAA

and the visual systems. This lesson discusses each of the

Instrument Landing

systems in detail.

System (ILS)

ILS characteristics 2.9.4.6.5

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High ILS Approach

T-45C is fully equipped and capable to fly ILS

Plate (Plan View)

ILS provides cockpit indications for final approach

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course and glidepath

Basic ILS Layout

ILS (with glideslope) is categorized as a precision

approach system

Some ILS installations also provide a back course

localizer-only, non-precision approach capability

ILS localizer and glideslope beams may be distorted

by vehicles or aircraft transiting close to an ILS

runway. At civilian airports:

Normal taxiway markings denote hold-short

spots that assure non-blockage of associated

Runway Safety Area, coincidental with the edge

of the Obstacle Free Zone (OFZ)

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