Surveyors use the transit to sight a location and read the angle of the point on a scale on the instrument. Early models of the transit measured horizontal angles only, but later models included a vertically adjustable telescope and scale for measuring vertical angles. The surveyor's transit combines the function of a compass with a telescope to provide greater accuracy in measuring angles than possible using a compass alone.Continue Reading
The telescope on the transit is reversible, allowing the surveyor to sight angles forward and backward along the traversed path. While originally less accurate than the English theodolite, the transit is more rugged, making it an ideal instrument for use in surveying the American frontier, according to the Smithsonian National Museum of American History.
For a century, surveyors depended on the transit for measuring angles. While electronic equipment eventually provided an easier to use instrument, it did not improve the accuracy of the transit, some of which measured to 0.5 seconds of an arc.
The transit played an important role in many transportation projects in the United States. Its use included laying out railroads, building the major roadways across the United States -including the interstate highway system - and the construction of the space shuttle.Learn more about Career Aspirations
An automatic level, builder's auto level, leveling instrument or dumpy level is a professional leveling tool that is used by land surveyors, builders, contractors and engineers. The automatic level is known for providing users with consistent leveling accuracy every time while also being fast, low cost and easy to use.Full Answer >
A theodolite is a precision instrument that measures vertical and horizontal angles, especially in triangulation networks. A transit is a simple form of a theodolite that comes equipped with a telescope but lacking in features such as mechanical meters and scale magnification.Full Answer >
To receive training to become an air ambulance pilot, students must first obtain a commercial pilot's license and have an instrument rating. Prospective air ambulance pilots and air ambulance crew members should also possess experience working in emergency care on the ground. An emergency medical worker with ample experience and qualifications may apply to an air ambulance training program, such as Priority 1 Air Rescue or Summit Air Ambulance.Full Answer >
Angular magnification is the magnification done by optical instruments with an eyepiece, where the ratio of an angle is delimited at the eye when using the instrument divided by the angular size without the instrument. A simple magnifier achieves angular magnification by permitting the placement of an object closer the eye than the eye's ability to focus in normal circumstances. The normal close focus distance in angular magnification is 25cm.Full Answer >