Flight Instructors Training Procedures _revised AIC_x

1. AIM
LESSON 10
USING THE ADF FOR TRACKING - PART 1
The aim of this exercise is to teach the student how to intercept and follow a specific track to an NDB
station i.e. a QDM.
DEFINITION
Using the ADF for tracking under IFR requires that the specified track is intercepted and followed while
flying the aircraft with sole reference to instruments.
2. WHAT THE INSTRUCTOR IS TO TEACH (Briefing of 1:00 hr.)
i. The principles of operation of the ADF.
ii. The parallel method of intercepting a QDM.
iii. Any other method of intercepting QDM’s.
iv. Drift correction procedures.
The parallel method of interception is suggested as a starting point because it is a simple straight
forward, all be it a long winded, method of intercepting the required track. In the event of disorientation
or having to intercept a track on limited panel the student will have a method of interception requiring a
minimum of thinking. Once this has been mastered any other method will be grasped easily.
3. WHY IT IS BEING TAUGHT
This exercise is taught so that the student will be able to manoeuvre the aircraft onto a given track and
be able to compensate for drift while on the track. This is a pre-requisite for accurate navigation in IMC
and for the NDB approach.
4. THE AIR EXERCISE
The start, taxi, take-off and climb will be the same as in earlier lessons. The clearance should
preferably not include interception a QDM at this stage. It is vital that the student learns to check the
ADF for correct functioning before commencing the flight. Generally at least two stations with
substantially different frequencies should be identified and checked for correct bearing indications.
i.
INTERCEPTING A QDM
i. Give the student the QDM. Guide the
student through the various steps required
for the intercept. i.e.:
a. Check DI against compass.
b. Tune and identify the ADF station.
c. Turn onto the same heading as
QDM.
d. Note where the ADF needle points.
e. Turn in the required direction for the
intercept.
f. When the ADF needle points to the
intercept, turn the aircraft onto the
correct heading.
ii. Have the student practice intercepting
QDM’s until proficient.
ii. DRIFT CORRECTION i. Introduce the student to the concept of
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