Section 7 IFR Procedures
7-24
IDU-450 EFIS Software Version 8.0H (Rotorcraft)
1
st
Ed Nov 2018
The parallel offset function is not available nor applies to:
1) Legs that are parts of approach procedures (IFR and VFR); or
2) Legs with complex geometries or that begin or end with dynamically
terminations. (ARINC-424 path types other than CF, DF, or TF or any
leg where the starting waypoint is not a fixed position); or
3) Legs that begin at an aircraft starting position (reference waypoint in a
DP or Start/Phantom waypoints created by the Direct-To function.
Parallel offset function does not propagate through the following:
1) Any waypoint at the beginning or end of a route discontinuity; or
2) Any waypoint at the beginning or end of a prohibited leg type; or
3) A waypoint with an unreasonable path geometry (defined as a turn
greater than 120°).
When the parallel offset function begins or ends within a flight plan due to
the above constraints, parallel offset entry (PTK+) or exit (PTK-) waypoints
are inserted into the flight plan.
appears in sufficient time
to alert the pilot to return to the original path. Discontinuities precede
parallel offset entry waypoints and follow parallel offset exit waypoints. This
allows the pilot to navigate to and from the parallel offset as required.
Figure 7-11: Parallel Offset PTK+/PTK ENTRY