INTERMEDIATE FLIGHT PREPARATION WORKBOOK
The P would be directed to turn to the outbound heading upon reaching 10.3 DME from the
NAVAID or at an appropriate number of radials approaching a Pt.-to-Pt.
Theoretically, you should always roll out on the radial after leading turns; however, this is not
always the case. As soon as the aircraft position can be determined after turn, a correction should
be made to the proper radial.
Prior to any course change a wind adjusted heading should be determined in order to maintain
course on the next leg. Knowledge of the winds, either preflight winds or computed winds,
allows a quick determination of crab (only minor heading adjustments should be needed for the
leg). If the winds are unknown, observe the drift after having been on course, then return to
course and adjust the heading to compensate for the drift. The CDI can be a very effective tool in
Any CDI needle deflection indicates you are off course. Remember, the needle is a "fly to"
indication and deflects in the direction you must turn. A good rule of thumb is to turn 10º from
wind corrected heading for every mile you are off course.
The TACAN is the primary NAVAID enroute.
Estimated Time of Arrival
The ETA to the next point is given during the Two-Minute Prior call. To determine ETA to the
next point, divide the leg distance by GS in NM/min and add to the ETA of the upcoming point.
On a 90º turn the crosswind component becomes headwind
Example: 420 KTS GS, leg distance 84 NM
84 NM / 7 NM/min = 12 minutes
After the initial estimate you may set up "gates" to further refine the time. A gate is a distance
equal to a whole number of minutes based on the current GS. A six-minute gate would be 39.0
NM, given a 390 KTS (6.5 NM/min) GS.
T1-A FLIGHT PROFILES 2-11