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Title:PRINCIPLES OF HEIGHT FINDING [Allocated Title]
Film Number:DRA 104
Summary: A military training film explaining the principles of height finding including optical measurement of range and view in eyepiece of height and rangefinder, with a description of the correct method of making coincidence. Also, measurement of sight and the mechanical computation of height from slant, range and angle of sight.
Description: High angle view of Norwich transformed into a drawing of the area so that the range of a gun can be calculated against the height of the cathedral tower. Two elements needed to get height - measurement of range and measurement of angle of sight. Extensive use of diagrams to explain internal mechanisms of height and rangefinder and to calculate height. Includes formulas eg height finding is H=RsinS.