Course Control - P-8620035

INTERMEDIATE FLIGHT PREPARATION WORKBOOK

CHAPTER TWO

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.

Course Control

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

managing drift.

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 10 from

wind corrected heading for every mile you are off course.

NOTE

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.

NOTE

On a 90 turn the crosswind component becomes headwind

component.

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