Garmin GNS 480 Installation Manual page 59

2.8.7.8 LOI (Loss of Integrity) Annunciation
P5-65 LOI Annunciate
The LOI Annunciate output is grounded when the WAAS / GPS detects a position error, or is unable to
calculate the integrity of the position (RAIM unavailable).
If an external annunciator is used for loss of integrity annunciation, the loss of integrity annunciator
should be labeled "LOI" in amber text.
2.8.7.9 Waypoint Annunciation
P5-66 Waypoint Annunciate
The Waypoint annunciator functions as follows:
When the aircraft is within 10 to 20 seconds of reaching a turning point for a course change, the
waypoint annunciator flashes.
When the aircraft is in a turn, the waypoint annunciator illuminates continuously and remains
illuminated until the turn is completed.
When the turn is complete and deviation information is being provided relative to the next leg, the
waypoint annunciator will extinguish.
If an external annunciator is used for waypoint annunciation, it is recommended that the waypoint
annunciator be labeled "WPT" in white text.
2.8.7.10 Terminal Mode Annunciation
P5-67 Terminal Mode Annc
The Terminal Mode Annc output is grounded when not in Approach mode, but navigating within 30 nmi
of the departure or arrival airport, or on a SID or STAR.
If an external annunciator is used for terminal mode annunciation, it is recommended that the terminal
mode annunciator be labeled "TERM" in green text.
2.8.7.11 Altitude Alert Annunciation
P5-69 Altitude Alert Annc
The Altitude Alert Annc output is grounded when all of the following conditions are true:
performing a WAAS GPS approach with vertical guidance;
on the approach inbound to the final approach fix (FAF); and
ownship WAAS altitude more than (50 meters plus the vertical protection limit (VPL)) below the
altitude at the FAF
If an external annunciator is used for altitude alert annunciation, it is recommended that the altitude alert
annunciator be labeled "ALT" in amber text.
GNS 480 (CNX80) Installation Manual560-0982-01 Rev A
Installation Procedures
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