TM 5-6675-329-13 & P
In this equipment a pendulum-type mechanism which automatically keeps the line of
sight level (horizontal).
A line of levels (height readings run between intermediate stations to determine the
difference in elevation between two widely separated stations.
In this instrument it is a transparent body with triangular ends which will reflect the
image of the circular level to the operators eye. Light reflected in vertical plane will be
bent 90°to the horizontal plane by the prism.
The cross hair markings in the focus of the objective of the telescope (horizontal,
vertical, wedge-shaped and stadia).
A method of surveying in which distances are read by noting the interval on surveying
staff intercepted by stadia cross hairs in the telescope lens.