Determine the location of the desired radial relative to the tail of the needle (left or
Start a turn toward the desired radial.
Stop the turn with the new course under the first 45º benchmark in the top half of the
RMI. Note and fly the associated heading.
To ensure you have the proper intercept established, check that the
head of the needle is in a position to fall, or the tail of the needle in
a position to rise to the new course. Also, to ensure proper sensing
of the CDI, check that the course selected is in the upper half of the
Maintain this intercept heading until the needle approaches the desired course.
Judge the rate of intercept and plan your turn to roll out on the new course.
Track on the desired course.
Turning toward the new COURSE vice RADIAL.
Not doing Steps 13 prior to beginning the turn.
Flying the benchmark instead of the heading.
Amplification The doubletheangle intercept is a maneuver that provides a shallow
and easily controlled rate of intercept to a desired course. The spacing between radials decreases
the closer you get to the station. A large intercept angle, when close to the NAVAID, could easily
result in overshooting the desired course. A shallow intercept (doubletheangle) would prevent
During the last half of your turn toward a desired course, note the number of degrees
between the head of the needle and the desired course inbound.
Utilizing the one-third rule, plan your rollout so as to stop on a heading double the
number of degrees from the desired course to the head of the needle. In other words,
place the head of the needle halfway between the aircraft heading and the desired
6-24 RADIO INSTRUMENT FLIGHT PROCEDURES