Garmin AERA 660 Pilot's Manual page 57

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HORIZONTAL SITUATION INDICATOR (HSI)
The graphic HSI depicts the course to the destination or the next waypoint in a flight
plan, current ground track, off course error, and a To/From indication. The rotating
compass indicates the aircraft's current ground track.
The course pointer and course deviation needle indicate the course and whether the
aircraft is on the course. The Bug Indicator can be set to 'Bearing' (default), 'Desired
Track', a specific heading reference ('User Selected'), or 'Off'.
Bearing is the compass direction from the present position to a destination waypoint.
Desired Track is the recommended direction to steer in order to reduce cross-track error
and return to the course line.
The Course Deviation Indicator, or needle, indicates how far off course, left or right,
based on its placement along the course deviation scale.
The course deviation scale setting is adjustable for Auto, ±0.25, 1.25 or 5.0 (nautical
mile, statute mile, or kilometer) full-scale deflection. The course deviation scale appears
on the upper right corner of the HSI. The default setting is Auto, which uses three
factors to determine the distance from the center of the CDI to full left or right limits:
• CDI scale = 1.25 - within 30 nm of any airport in the active route.
• CDI scale = 0.25 - on an approach leg or within 2 nm of the FAF or MAP.
• CDI scale = 5.0 - if the previous two conditions do not exist.
190-02017-20 Rev. A
3D Vision Menu
Garmin aera 660 Pilot's Guide
Navigation
41

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