MIL-DTL-12713E
Drawings may also include drawings prepared by, and identified as Edgewood Arsenal,
Frankford Arsenal, Rock Island Arsenal, or Picatinny Arsenal drawings. Technical data
originally prepared by these activities is now under the cognizance of ARDEC.
6.5 Packaging data sheet drawings. The following packaging data sheet drawings
should be obtained from U.S. Army ARDEC, ATTN: RDAR-EIL-P B455, Picatinny, NJ
07806-5000.
SPI 13042173 - Packaging of Quadrant, Gunner's, M1A3 W/Case, Carrying
6.6 Suggested end-for-end procedure. Zero the index arm and micrometer of the
gunner's quadrant. Place the quadrant on an adjustable elevation fixture and adjust the
fixture to center the level vial bubble of the gunner's quadrant. Reverse the direction of the
gunner's quadrant; if the level vial bubble centers without adjustment, then the end-for-end
correction is 0.
If the level vial bubble does not center, adjust the gunner's quadrant using the
micrometer (or, for a negative correction, lower the index arm by 10 mils and adjust the
micrometer) until the level vial bubble is centered. Take this gunner's quadrant reading,
divide it by 2, and input that value into the gunner's quadrant utilizing the micrometer.
With the above correction value set on the gunner's quadrant, place the quadrant on an
adjustable elevation fixture and adjust the fixture to center the level vial bubble of the
gunner's quadrant. Reverse the direction of the gunner's quadrant; if the level vial bubble
centers without further adjustment, then the reading that is shown on the gunner's quadrant
is the end-for-end correction.
6.7 Thermal shock. Caution should be exercised during environmental testing to
avoid subjecting the quadrant to thermal shock.
6.8 Subject term (key word) listing.
Howitzer
M119
M777
M198
Self Propelled Artillery
Towed Artillery
6.9 Changes from previous issue. Marginal notations are not used in this revision to
identify changes with respect to the previous issue due to the extent of the changes.
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