Joshua Habermel (Erasmus Habermehl) created a theodolite with a compass and tripod in 1576. Johnathon Sission was the first to incorporate a telescope on a theodolite in 1725. With continuing refinements, instruments steadily evolved into the modern theodolite used by surveyors today. Prior to the invention of the theodolite, the goniometer was used in surveying. The theodolite is an instrument for the measurement of angles. The Ordnance Survey's high precision theodolite was not taken to the summit until 1841. Jesse Ramsden introduced the first precision theodolite in 1787. Consider tracking a helicopter flying towards the theodolite from the horizon. Cooke, Troughton and Simms developed the Tavistopck pattern theodolite and later the Vickers V. 22. Horizon altitudes can be measured with a theodolite or a clinometer. Each measurement made by theodolite during the retriangulation was repeated no fewer than 32 times. The first Ramsden theodolite was built for this survey. This was the "transit theodolite". He created his great theodolite using an accurate dividing engine of his own design. To turn angles, a theodolite was used.