Section I. GENERAL
Deficiencies. Fill out and forward DD Form 6
(Report of Packaging and Handling Deficiencies)
This manual contains information for the main-
as prescribed in AR 700-58 (Army)/NAVSUP
tenance of the Indicator ID-48A/ARN. Included
Publication 378 (Navy/AFR 71-4 (Air Force)/
are instructions for the overhaul and repair,
and MCO P4630.29 (Marine corps).
calibration and test procedures to be used in the
c. Discrepancy in Shipment Report (DISREP)
performance of organization, direct and general
(SF361). Fill out and forward Discrepancy in
S h i p m e n t R e p o r t (DISREP)
1-2. Index of Publications
prescribed in AR 55-38 (Army)/NAVSUP Pub
a. DA Pam 310-4. Refer to DA Pam 310-4 to
4 5 9 (NAVY)/AFM 75-34 (Air Force)/ and
determine whether there are new editions, changes,
MCO P4610.19 (Marine Corps).
or additional publications p e r t a i n i n g to the
d. Reporting o f E q u i p m e n t P u b l i c a t i o n
Improvements. The reporting of errors, omissions,
b. DA Pam 310-7. Refer to DA Pam 310-7 to
a n d recommendations f o r i m p r o v i n g t h i s
determine whether there are modification work
publication by the individual user is encouraged.
orders (MWO'S) pertaining to the equipment.
Reports should be submitted on DA Form 2028
(Recommended Changes to Publications) and
1-3. Forms and Records
forwarded direct to Commanding General, U. S.
a. Reports of Maintenance and Unsatisfactory
Army Electronics Command, ATTN: AMSEL-
Equipment. Use equipment forms and records in
ME-NMP-AN, Fort Monmouth, N.J. 07703.
accordance with instructions in TM 38-750.
b. R e p o r t o f P a c k a g i n g a n d H a n d l i n g
Section Il. DESCRIPTION AND DATA
instrument approach receivers to provide a visual
1-4. Purpose and Use
indication of the position of the aircraft with respect
a. Purpose. The Instrument Approach System
to radio-frequency space patterns generated by the
provides the pilot with a straight line glide path
ground transmitter equipment of the instrument
beam and a runway localizer beam. To enable the
approach systems. The Indicator two main in-
pilot to follow the two beams, the aircraft is
dicating pointers, localizer and glide path pointers,
e q u i p p e d with an ID-48/ARN Indicator. The
establish the position of the runway localizer and
Indicator operates from the output of the aircraft
the glide path beams with respect to the image of
localizer and glide path receivers. The marker
the airplane printed at the center of the dial of the
beacon lamp on the Indicator is operated from a
separate marker beacon receiver.
b. Use. The Indicator is used in conjunction with