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Section 2 System Overview
1
st
Ed Nov 2018
IDU-450 EFIS Software Version 8.0H (Rotorcraft)
2-5
HF
Holding, Pattern to Fix (ARINC-424 Leg)
HM
Altitude or Manual Termination (ARINC-424 Leg)
HAL
Horizontal Alert Limit
HAT
Height Above Threshold
HDG Heading
HFOM
Horizontal Figure of Merit
hh:mm:ss
Hours: Minutes: Seconds
HITS
Highway in the Sky
HLTH Health
HORIZ Horizontal
HOTAS
Hands on Throttle and Stick
hPa Hectopascal
HPL
Horizontal Protection Level
HRZ SYNC
Horizon Synchronization
HSI
Horizontal Situation Indicator
HUD Head
Up
Display
IAP
Instrument Approach Procedure; Initial Approach Point
IAS Indicated
Airspeed
IAWP
Initial Approach Waypoint (same as IAP)
ICAO
International Civil Aviation Organization
ID
Identity or Identification
IDU Integrated
Display
Unit
IF
Initial Fix leg
IFR
Instrument Flight Rules
ILS
Instrument Landing System
IM Inner
Marker
INFO Information
INHBT Inhibit
inHg
Inches of Mercury
INIT Initialize
IO
Input/Output
IP Initial
Point
IPV
Instrument Procedure with Vertical Guidance
ISA
International Standard Atmosphere