Garmin GNC 355, Pilot'S Manual, Page: 187 / 290

Navigation
190-02488-01 Rev. B Pilot’s Guide 3-85
LP APPROACH
This segment describes a typical LP approach sequence and the necessary pilot
actions.
Within 30 nm of destination:
•
Mode switches from En Route to Terminal
•
CDI scale transitions from 2.0 nm to 1.0 nm, full-scale deflection
Approaching initial approach fix:
•
Turn direction message annunciates
•
Time to Turn advisory annunciates and 10 second timer counts down as the
distance approaches zero
Approaching final approach fix:
•
Unit begins to automatically rescale in an angular fashion, allowing you to fly
as you would a standard localizer approach
2.0 nm from final approach fix:
•
CDI scaling tightens from 2 degrees or 0.3 nm full-scale deflection,
whichever is smaller
60 seconds before final approach fix:
•
System verifies GPS integrity is within the horizontal limits to complete the
LP non-precision approach
Points About LP Approaches
•
Use SBAS accuracy, making them similar to an LNAV approach but more precise
•
Combine the lateral accuracy of an LPV approach with the angular scaling of a
localizer approach
•
Often contain step-down altitudes
•
Always result in a minimum descent altitude and missed approach point