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|  MIL-D-70789A (AR)
3.
REQUIREMENTS
3.1
First article. When specified, a sample shall be
subjected to first article inspection (See 4.6 and 6.3).
3.2 Qualification. DRUs furnished under this specification
shall be products which are authorized by the qualifying activity
for listing on the applicable qualified products list at the time
set for opening of bids (See 4.5 and 6.4).
3.3
Fabrication. The Dynamic Reference Unit shall be
manufactured in accordance with this specification and figures
included in this specification.
3.4 General specification. The contractor shall be
responsible for compliance to the requirements of paragraphs
4.2.2.1 to 4.2.2.3 of specification MIL-F-13926.
3.5
Item
definition.
3.5.1 Item functions. The DRU shall be a self-contained
inertial surveying system for use in U.S. Army weapon and target
acquisition systems. The DRU shall provide, depending on the
application, all or part of the following:
a. Horizontal Position in Universal Transverse Mercator
(UTM) coordinates of nothing, casting, hemisphere and zone.
b. Horizontal Position in British National Grid
coordinates of northing and casting.
c. Horizontal Position in Geodetic coordinates of
latitude and longitude.
d.
Altitude.
e. Angular Orientation consisting of Pointing Device
Grid Azimuth or Geodetic Azimuth, Pointing Device Pitch and
Pointing Device Roll or Cant.
f. Angular Orientation consisting of Vehicle Grid
Azimuth or Geodetic Azimuth, Vehicle Pitch and Vehicle Roll or
Cant.
g. DRU North, East, and Up velocities.
h. Angular Velocity consisting of Pointing Device
Azimuth Rate, Pointing Device Pitch Rate, and Pointing Device
Roll Rate.
6
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