GG-T-621C

Abstract

This specification covers one-minute transits and tripods for use with transits. <br>Transits shall be of the following classes, as specified (see <a>6.2</a>): </span><pre> Class A - Small, lightweight; mountain or mining transits. Class B - Average size and weight; engineer's and city transits. Class C - Maximum size and weight; surveyor's traverse and triangulation transits.</pre> <br> <br><b><u>Intended Use:</u></b> The transits are intended for use in surveying operations. Class A covers an instrument of minimum weight, small dimensions, and compactness for use where those factors are of essential importance consistent with the required accuracy. Class B covers an instrument of medium weight and dimensions for use where transportation is not a critical problem or where circles larger than class A are desirable. Class C covers an instrument of maximum weight and dimensions for use where transportation facilities are readily available or where a higher order of refinement in determination of angular values is required. <br>