Figure 24 - P-8010054

INSTRUMENT NAVIGATION

For turns at a navaid, lead the turn by minimum DME plus 1/2 of 1% of ground speed. In

this case "Mark On Top" shall be defined as the TACAN needle passing either 90 benchmark

(wingline) on the RMI.

When turning at a fix not located at a NAVAID, simply lead the turn by 1/2 of 1% of ground

speed. In either case only lead turns that are greater than 30.

xamples: Figures 24 and 25.

Keep in mind that even though both of the following examples are turns onto direct legs, we

must also lead turns onto airways. If you are turning onto an airway, and even after properly

leading the turn you roll wings-level and find yourself not on the airway (due to gusting winds or

nonstandard rate of turn or whatever), you must turn to intercept the airway in an expeditious

manner. If you are turning onto a direct leg, simply lead the turn as described above, tune and

identify the "new" TACAN station, and as you roll wings-level fly the course indicated by the

head of the #2 needle.

Figure 24

3-16 RADIAL TRACKING AND COURSE CONTROL