HSI (Planemetric or Course Deviation Indication)

Introduction to Basic Instruments

T-45C TS & ADV BIFP-02

B. HSI (Planemetric or Course Deviation Indication)

1. Purpose:

a. Displays aircraft heading

b. Shows aircraft position relative to selected course

c. Provides secondary ILS course information when ILS

is the selected steering option

C. HSI (TACAN and Waypoint data block)

1. Location: on the HSI display

2. Purpose: displays bearing, slant range between TACAN

or VOR/DME station or straight line range to a waypoint

and the aircraft, and time to go at the current ground

speed

D. ADI (glideslope and azimuth deviation bars)

1. Location: on the ADI display

2. Purpose: provide glideslope and primary course

information during an ILS approach

E. Pressure altitude

1. Location: on the ADI display

2. Purpose:

a. Displays aircraft altitude in reference to a standard

plane (sea level)

b. Indicates climbs and descents

c. Primary verification for pitch attitude for most

maneuvers

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