Polished Brass 3.5" Square Brunton Pocket Transit Surveying or Geology Compass in a Wood Box
Polished Brass 3.5 Square Brunton Pocket Transit Surveying or Geology Compass in a Wood Box
The Pocket Transit Brunton style compass may be adjusted for declination angle according to one's location on the Earth. It is used to get directional degree measurements (azimuth) through use of the Earth's magnetic field. Holding the compass at waist-height, the user looks down into the mirror and lines up the target, needle, and guide line that is on the mirror. Once all three are lined up and the compass is level, the reading for that azimuth can be made. Arguably the most frequent use for the Brunton in the field is the calculation of the strike and dip of geological features (faults, contacts, foliation, sedimentary strata, etc.). Strike is measured by leveling (with the bull's eye level) the compass along the plane being measured. Dip is taken by laying the side of the compass perpendicular to the strike measurement and rotating horizontal level until the bubble is stable and the reading has been made. If field conditions allow, additional features of the compass allow users to measure such geological attributes from a distance.
Please note the above explanation is only for reference purposes and this compass has not been made for precise readings. It would make a great souvenir gift for geologists, archaeologists, environmental engineers, mining engineers and surveyors. The United States Army has adopted the Pocket Transit as the M2 Compass for use by crew-served artillery.
The compass is made of solid polished brass , it comes in a wood box with a natural sign scale.
Dimensions L 8.9 cm x W 7 cm x D 3 cm
Please choose below from the 2 version
Polished Brass or Polished Black