When intercepting an arc from a radial that is significantly more or less than a 90 degree turn, adjust the
lead point by applying the following:
For turns of approximately 45 degrees use 1/3 of the distance calculated for a 90 degree turn.
For turns of approximately 60 degrees use 2/3 of the distance calculated for a 90 degree turn.
Turns of 30 degrees or less, require very little lead.
10 DME Arc
Lead Point DME
1% GS = Radius of Turn
Figure 22: RADIAL TO ARC INTERCEPT PROCEDURE
Maintaining an Arc Around a Station
Two ways of maintaining an arc around a station are the chord method and the angle of bank method.
Either procedure (or a combination of the two) will work at any distance from a station. However, the
chord method is generally more practical when youre flying a distant arc (usually more than 12 DME from
a station) while the angle of bank method usually works better when youre flying an arc close in (12 DME
or less). The chord method consists of a series of short straight legs, connected by turns. The angle of
bank method is flown as a shallow turn with variable AOB to maintain a constant arc.