A lemniscate curve between the tangents will be transitional throughout if the polar deflection angle of its apex, is

Number of subdivisions per metre length of a levelling staff is

Tacheometric formula for horizontal distances using horizontal sights can also suitable be employed for inclined sights through θ by multiplying

Accidental or compensating errors of length L are proportional to

For locating a distant object visible from two transit stations, the method usually preferred to, is