Hilger Watts Theodolite Manual Jun 2026

Secure the theodolite to the tripod head using the central fixing screw.

Vertical angles on Hilger & Watts instruments are usually referenced to the (straight up = 0°).

Formed in February 1948 through the merger of (est. 1874) and E.R. Watts & Son (est. 1856), the company became a global leader in scientific and surveying instrumentation. Their instruments, particularly the "Microptic" series, were standardized for use by the British military and colonial surveying departments. Popular Models & Their Features hilger watts theodolite manual

: Use the eyepiece to focus the crosshairs first, then use the main focusing ring for the target to eliminate parallax. Reading Angles

Point the telescope toward a blank background (like the sky or a white wall). Secure the theodolite to the tripod head using

This is the most distinct feature of Hilger & Watts theodolites. You do not read numbers directly; you match lines.

These manuals didn't just build roads; they tracked the sky. The , a specialized sibling, was used by the Met Office to track weather balloons as they drifted into the stratosphere, recording the invisible winds of the post-war world. 1874) and E

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A smaller eyepiece located next to or near the main telescope eyepiece, used strictly for reading the horizontal and vertical angle circles.