Dynon Avionics FlightDEK-D180 Pilots Users Guide - Manual (Page 27)

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The CDI is located just above the slip/skid ball when displayed, and behaves much as described in the HSI Operation
section on page 6-1. The CDI needle is green when sourced from a NAV radio and magenta when sourced from GPS.
When to/from information is available, the center of the CDI is an arrow; when on an ILS, it is a filled-in square.
The glideslope indicator is located to the left of the roll scale tape, and behaves much as described in the HSI Operation
section on page 6-1. The GS needle is green when sourced from a NAV radio and magenta when sourced from GPS, and
appears only when tuned to an ILS or a GPS source with vertical guidance.
Due to screen space limitations, turning on the glideslope prevents a left info item from being displayed on the 2/3-
screen EFIS page. Additionally, at extreme roll angles, the glideslope is hidden to provide space for other screen
elements.
Stabilized heading tape and digital readout
Located at the top of the EFIS page, the heading indicator
functions much like a standard slaved directional gyro. North,
East, South, and West directions are labeled on the tape, “N,” “E,” “S,” and “W,” respectively. The digital readout
displays your current heading, while the surrounding tape scrolls beneath its arrow. You may set a yellow bug on this
tape as a heading reminder. The pointer in the digital readout is hollow to allow the GPS ground track indicator,
displayed as a magenta arrow, to show through. A difference between the ground track arrow and the current heading
indicates that some wind is present. The currently set course heading is represented by a “V,” colored green when
sourced from a NAV radio and magenta when sourced from GPS. When the CDI is centered, aligning the ground track
pointer within the course pointer compensates for all wind and takes you directly to the waypoint or VOR. For course
and ground track to be displayed on the heading tape, they must both be enabled in the CLUTTR menu.
Like a conventional gyro-stabilized magnetic compass, magnetic heading reacts immediately to turn rate so that heading
changes are reflected immediately. It then uses magnetometer data over the long term to ensure that it remains correct.
Additionally, heading is corrected for attitude so that it is accurate as you pitch and roll.
4-4 FlightDEK-D180 Pilot’s User Guide