Compass; 360° Compass Mode; Arc Compass Mode - Aspen Avionics Evolution Backup Display EFD1000 Pilot's Manual

All Magnetic Headings are displayed in degrees. The value range is from 001° - 360°,
always displayed in three digits, and use leading zeros when applicable. The Magnetic
North is expressed as 360°.

4.4.1. Compass

The EBD offers two Compass Modes: 360° and ARC The default Compass Mode is 360.
The aircraft's heading is always expressed degrees magnetic. The magnetic headings
inside of the compass scale omit the last zero for brevity (i.e., 30°, 60°, 120°, 150°, 210°,
240°, 300°, and 330° are labeled 3, 6, 12, 15, 21, 24, 30, and 33, respectively). The four
cardinal compass headings are shown as letters (i.e., N for 360°, E for 090°, S for 180°, and
W for 270°).
4.4.1.1. 360° Compass Mode
The 360° Compass Mode displays a full 360° compass rose with all other components
of the Direction Indicator. The 360° compass rose rotation centers on the aircraft
ownship symbol so that the numerical direction indication corresponds to the current
aircraft heading (Figure 4-40).

4.4.1.2. ARC Compass Mode

The two ARC Compass Modes have an abbreviated 100° ARC compass scale. All
other elements of the Direction Indicator are retained. The ARC Compass Mode's
scale rotation centers on the aircraft ownship symbol so that the numerical direction
indication corresponds to the current aircraft heading.
091-00027-001 REV A
091-00027-001 Rev A EBD Pilots Guide V&H .indb 23
Evolution Backup Display Pilot's Guide
Figure 4-40
360° Compass Mode
Page 4-23
8/27/14 8:51 AM