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| STUDENT GUIDE
VISUAL NAVIGATION
WIND COMPONENT BREAKDOWN
HEAD/TAIL WIND
CROSSWIND
360 ------------------------------------- ADD FULL WIND
ZERO
030 ------------------ ADD 3/4 OF WIND
1/2 OF WIND
045 -----
ADD 2/3 OF WIND
2/3 OF WIND
060 ---ADD 1/2 OF WIND
3/4 OF WIND
090
ZERO
FULL WIND
120 -- SUBTRACT 1/2 OF WIND
3/4 OF WIND
135 --------
SUBTRACT 2/3 OF WIND
2/3 OF WIND
--------- SUBTRACT 3/4 OF WIND
1/2 OF WIND
150
180 -----------------------------------
SUBTRACT FULL WIND
ZERO
FOR T-1/T-39 VNAV, USE 1 CRAB FOR EACH 5 KTS OF CROSSWIND.
Figure 7-5
7.8. COMPENSATE
7.8.1. The Fix enabled you to Analyze the winds, now you need to Compensate for their effect
on the course and mission timing. Calculate crab just as you did in instrument navigation. For
T-34 flights at 150 kts, each degree of crab equates to 2.5 kts. of crosswind (150/60). In the T-1
at 300 kts airspeed each degree of crab equates to 5 kts. of crosswind (300/60). Rounding wind
values to the nearest 5 kts, adjustments to base heading are always in 1 increments.
7.8.2. Head and tail winds also require compensation. Make adjustments to your base airspeed
(the indicated airspeed you calculated to fly 300 KTAS, see Figure 7-1) in 5 kt increments for the
head/tailwind you encounter.
7-8
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