Section I. GENERAL
d. Report all deficiencies in this manual on DA
Form 2028. Submit recommendations for changes,
a. These instructions are for the use of the
additions, or deletions to the Commanding Officer, U.
personnel to whom the Wild Heerbrugg Model T-3
S. Army Mobility Support Center, ATTN: SMOMS-MS
Theodolite is issued. Chapters 1 through 5 provide
Box 119, Columbus 16, Ohio.
information on the operation, preventive maintenance
communication is authorized.
services, and organizational maintenance of the
equipment, accessories, components, and attachments.
Chapter 6 provides information for field and depot
recommendations as prescribed by TM 38-750.
maintenance (3d, 4th, and 5th echelons). This manual
also provides descriptions of the main units and their
2. Record and Report Forms
functions in relationship to other components.
For record and report forms applicable to the
operator and organizational maintenance, refer to TM
list of basic issue items authorized the operator of this
The organizational, field, and depot
maintenance repair parts and special tool lists are listed
in TM 5-6675-231-25P.
Standard Form 46, which is carried
c. Numbers in parentheses on illustrations indicate
by the operator, shall be kept in a
quantity. Numbers preceding nomenclature callouts on
canvas bag mounted on the
illustrations indicate the preferred maintenance
Section II. DESCRIPTION AND DATA
circles during daylight operation is accomplished by
The Wild Heerbrugg Model T-3 Theodolite (figs. 1
through 4) is a precision, directional type surveying and
tracking instrument. It has both vertical and horizontal
provided for night operation. Eyepiece prisms for
circle scales, calibrated in degrees for reading the value
attachment to the telescope and microscope eyepieces
of angles. Such readings are observed through the
during high-angle and astronomical observations are
contained in the accessory case. The telescope is
4) is provided for the interpolation of angle value
equipped with a 30-power eyepiece, optional eyepieces
readings to 2/10 second degree accuracy.
of 24 and 40 power, which are stowed in the carrying
horizontal circle housing contains the 3 leveling screws
case base, and may be installed when necessary.