Map Range - Garmin Cirrus Perspective SR20 Pilot's Manual

FLIGHT MANAGEMENT

MAP RANGE

There are 28 different map ranges available, from 500 feet to 2000 nm. The current range is indicated in
the lower right corner of the map and represents the top-to-bottom distance covered by the map. When the
map range is decreased to a point that exceeds the capability of Perspective to accurately represent the map,
a magnifying glass icon is shown to the left of the map range. To change the map range turn the Joystick
counter-clockwise to decrease the range, or clockwise to increase the range.
AUTO ZOOM
Auto zoom allows Perspective to change the map display range to the smallest range clearly showing the
active waypoint. Auto zoom can be overridden by adjusting the range with the Joystick, and remains until
the active waypoint changes, a terrain or traffic alert occurs, the aircraft takes off, or the manual override times
out (timer set on Map Setup Window).
If a terrain caution or warning occurs, any map page displaying TAWS/TERRAIN data automatically adjusts
to the smallest map range clearly showing the highest priority alert. If a new traffic advisory alert occurs, any
map page capable of displaying traffic advisory alerts automatically adjusts to the smallest map range clearly
showing the traffic advisory. When terrain or traffic alerts clear, the map returns to the previous auto zoom
range based on the active waypoint.
The auto zoom function can be turned on or off independently for the PFDs and MFD. Control of the
ranges at which the auto zoom occurs is done by setting the minimum and maximum 'look forward' times
(set on the Map Setup Window for the Map Group). These settings determines the minimum and maximum
distance to display based upon the aircraft' s ground speed.
• Waypoints that are long distances apart cause the map range to increase to a point where many details on
the map are decluttered. If this is not acceptable, lower the maximum look ahead time to a value that limits
the auto zoom to an acceptable range.
• Waypoints that are very short distances apart cause the map range to decrease to a point where situational
awareness may not be what is desired. Increase the minimum look ahead time to a value that limits the auto
zoom to a minimum range that provides acceptable situational awareness.
• Flight plans that have a combination of long and short legs cause the range to increase and decrease as
waypoints sequence. To avoid this, auto zoom can be disabled or the maximum/minimum times can be
adjusted.
Cirrus Perspective
160
Figure 5-6 Map Range
by Garmin – Pilot's Guide for the SR20/SR22/SR22T
™
Range Overzoom
190-00820-08 Rev. A