TM-9-2350-311-34-2
CAB, ARMAMENT, SIGHTING AND FIRE CONTROL, ELEVATING AND TRAVERSING SYSTEMS AND ASSOCIATED COMPONENTS HOWITZER, MEDIUM, SELF-PROPELLED, 155MM
TECHNICAL MANUAL; DIRECT AND GENERAL SUPPORT MAINTENANCE MANUAL
SEPTEMBER 1994
TM-9-2350-311-34-2 - Page 56 of 552
TM 9-2350-311-34-2
1-14 LOCATION AND DESCRIPTION OF MAJOR COMPONENTS — CONTINUED
1-14.14 Location and Description of Overall Sighting and Fire Control System — Continued
The M1A1 collimator is radioactively illuminated. Check for presence of illumination and damage.
If discovered broken, damaged, or defective, follow the procedures on page b.
e. M1A1 Collimator. When in use, the M1A1 collimator (7) is mounted on a tripod a short distance from vehicle. Its illumi-
nated retitles provide a fixed reference point to correct sighting after a round has bean fired. The M1A1 collimator
contains radioactive tritium gas (H
3
). For information on M1A1 collimator, refer to TM 9-1240-324-34&P.
1-36
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