Updated: Dec 8, 2020

ILS Approach Lesson by wifiCFI


ILS stands for “Instrument Landing System.”

An ILS is a type of Precision Approach.

It contains 4 parts:

Lateral Guidance – Localizer

Vertical Guidance – Glideslope

Distance Information – Marker Beacons/DME Waypoints

Approach Light System

We suggest studying the “IFR Ground: Approach Procedures Lesson” prior to this lesson.

KOGD ILS RWY 03 Example

For this lesson, we will fly an example ILS approach to KOGD Airport.

We will discuss flying the full approach and flying vectors to the final approach course.

KOGD ILS RWY 03 Example

Full Approach Example from JOSIF (IAF)

“N736TB, proceed direct JOSIF, maintain 8600.”

While en-route to the IAF, we should perform “ABC”

A: Airspeed/ATIS

Slow airspeed to set up for approach.

Obtain the airports ATIS/AWOS.

B: Build and Brief

Build the approach in the Instrument Approved GPS if applicable.

Brief the “Briefing Section” of the approach.

While briefing, be sure to input all necessary comm and nav frequencies.

C: Checklist

Run the approach checklist.


It is important to complete the ABC’s as soon as possible.

If a pilot is “ahead” of the airplane, it makes the approach much easier.

How to Brief the Approach

1: Name of Approach

2: Approach Navigation Frequency

Brief and Input

3: Approach Course

Brief and Input

4: Runway Length and TDZE

5: Notes

6: Approach Light System

7: Missed Approach Instructions

8: MSA Altitudes

9: Final Approach Fix

10: Minimum Altitude and Visibility

11: Missed Approach Point

“N736TB, maintain 8600 until established, cleared for the ILS Runway 3 Approach.”

Full Approach Example from JOSIF (IAF)

Instrument ACS Standards

Establish proper two way radio communications.

Select, tune, and identify the proper navigation facility.

Comply with ATC/Examiner Clearances.

Establish proper airplane configurations and airspeeds.

Maintain Altitude +/- 100’.

Maintain Heading +/- 10 Degrees.

Maintain Airspeed +/- 10 KIAS.

Maintain a stabilized approach course with less than ¾ scale deflection for lateral and vertical navigation.

Execute missed approach procedures without proper runway environment criteria in sight or,

Transition to a normal landing while following proper visual glidepath indications.

Normal landing made within the runway touchdown zone.

FAA Sources Used for This Lesson

Instrument Flying Handbook

Instrument Airmen Certification Standards (ACS)

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