Section 2 System Overview
2-20
IDU-450 EFIS Software Version 8.0H (Rotorcraft)
1
st
Ed Nov 2018
(ADC). However, airspeed data becomes noisy and inaccurate as the
aircraft slows, and the system automatically transitions to GPS
groundspeed (at approximately 55 KIAS) under these conditions.
When flying in a GPS-denied environment, be aware that flight below 55
KIAS could result in a degraded roll attitude solution. Therefore, avoid IMC
conditions and crosscheck other attitude instruments when flying below 55
KIAS and transition to flight above 55 KIAS as soon as practicable.
NOTE:
Not applicable for rotorcraft with other AHRS than Genesys ADAHRS
installed.
2.4 Color
Conventions
The EFIS uses a consistent set of colors to display information. Any color
representation may not be identical as it appears on the IDU.
WHITE
for items set by pilot and held by the EFIS or items where
device feedback is not expected; marker beacon receiver high/low
sensitivity modes; scales, associated labels and figures; pilot
action; or data entry. Examples:
Scales markings (airspeed, altitude, heading, VSI, pitch, map
ranges, etc.)
Pilot-selected values (airspeed, heading, altitude)
Secondary flight data (TAS, wind, OAT, timers, etc.)
When used for an analog bar indication, light gray (low-intensity
white) is used instead as a large white area on the screen may
become overwhelming.
CYAN
for IFR navigation dataset items (airports with instrument
approach procedures, VORs, and intersections) and VOR #1.
MAGENTA
(light magenta for visibility) indicates calculated or
derived data and certain navigation database items. Examples:
Active waypoint related symbols
Course data (desired track, CDI)
VFR airports, NDBs
VNAV
altitudes
