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CHAPTER FOUR
T-6A INSTRUMENT NAVIGATION
3.  Start the outbound leg timing (1 minute at or below 14,000 MSL, 1 1/2 minutes above
14,000 MSL).
4.  At the completion of outbound leg timing (or DME if appropriate), direct the pilot to
commence a SRT towards the holding radial to intercept the holding course inbound.
Remember; TAIL - RADIAL - TURN.
At the completion of the turn, you will either be inbound on the holding course or have a
situation requiring a DTA intercept.
5.  As you roll wings level, start your clock for your inbound timing (for timed holding). Steps
5 and 6 should be accomplished almost simultaneously.
6.  For over-the-station holding only, check the position of the head of the bearing pointer
relative to the holding course. If they differ, note the number of degrees difference - 1/2 this
difference should approximate the required crab angle inbound. For both over-the-station and fix
holding, expeditiously establish the aircraft on the holding course and attempt to determine the
appropriate crab angle to remain there.
7.  When outbound, triple the inbound drift correction. If outbound timing goes longer than 1
minute, transition to single drift until turning inbound. When inbound, use single drift. This is
referred to as triple drift correction. For example, if correcting left 8 when inbound, correct
right 24 when outbound.
8.  At station passage, note the elapsed time (to the nearest second). The difference between
this inbound timing and 1 minute (1 1/2 minutes if above 14,000 feet MSL) is the correction
factor you will use for timing on the outbound leg of your correction orbit when executing timed
holding.
NOTE
If DME is used to determine leg length, begin the inbound turn at
the appropriate DME. Otherwise, the timing adjustment will
apply.
If you had to set an intercept when you turned inbound and there is a crosswind, use the
following method to determine what direction the wind is from. While the intercept is set,
visualize a line drawn from the tail of the bearing pointer through the radial to the nearest
cardinal heading. This is, roughly, the direction the wind is from. For ease in computing
headings on correction orbits, always think of the wind as being from north, south, east, or west
and not left or right.
Remember; TAIL - RADIAL - WIND.
4-38 INSTRUMENT NAVIGATION


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