Garmin GTN 635 Installation Manual page 73

5.2.10.4 WAYPOINT ANNUNCIATE*
The WAYPOINT ANNUNCIATE* output is driven in the following manner:
1. When the aircraft is within 10 seconds of reaching the turning point for a course change, the
waypoint annunciator flashes.
2. When the aircraft is in a turn, the waypoint annunciator illuminates and remains illuminated until
the turn is completed.
3. When a user arrival alarm is set and the aircraft is within the circle defined by the arrival alarm
radius at the arrival waypoint, the waypoint annunciator flashes for 10 seconds.
4. When a user arrival alarm is not set and the aircraft is within 10 seconds of reaching the arrival
waypoint, the waypoint annunciator flashes.
5.2.10.5 TERMINAL ANNUNCIATE*
When performing approach navigation, the TERMINAL ANNUNCIATE* output is active when
operating within 30 nautical miles of the departure or arrival airport and the CDI scale is the equivalent or
1.0 nm or less.
5.2.10.6 TAWS AUDIO ACTIVE OUT*
The TAWS AUDIO ACTIVE OUT* is active when the GTN is issuing a TAWS alert. This output can
be connected to the Audio Inhibit input of other units with audio that is lower priority than TAWS.
5.2.10.7 VLOC ANNUNCIATE* (GTN 650 Only)
The VLOC ANNUNCIATE* output is driven when the unit is configured with a single CDI/HSI and the
VOR/ILS data is being displayed on the CDI/HSI. This output parallels the VLOC annunciator on the
display.
5.2.10.8 LOI ANNUNCIATE*
The LOI ANNUNCIATE* output is active when the GPS receiver detects a position error, or is unable to
calculate the integrity of the position. On the 400W/500W Series navigators, this output was called
‗Integrity Annunciate'.
5.2.10.9 MESSAGE ANNUNCIATE*
When a new status message is available, the MESSAGE ANNUNCIATE* output is active and the
message annunciator flashes. When status messages remain effective, the message annunciator
illuminates continuously.
5.2.10.10 APPROACH ANNUNCIATE*
When performing approach navigation, the APPROACH ANNUNCIATE* output is active while an
approach is active.
5.2.10.11 ILS/GPS APPROACH*
The ILS/GPS APPROACH* output is active when:
GPS navigation is selected and either a GPS approach mode is active or 0.3 nm is selected for the
CDI full scale deflection; or
VLOC navigation is selected and an ILS channel has been selected.
This output may be connected to the ILS Engage input of an autopilot or flight director to provide higher
autopilot gain while the GTN is operating in the ILS or GPS Approach modes of operation.
GTN 625/635/650 TSO Installation Manual
190-01004-02
Page 5-17
Rev. C