How to Calculate Height of Instrument?
Height of Instrument calculator uses Height of Instrument = Reduced Level+Back Sight to calculate the Height of Instrument, The Height of Instrument is taken as the vertical distance of the instrument from the surface of earth. It is also taken as the height of the plane of collimation. Height of Instrument is denoted by HI symbol.
How to calculate Height of Instrument using this online calculator? To use this online calculator for Height of Instrument, enter Reduced Level (RL) & Back Sight (BS) and hit the calculate button. Here is how the Height of Instrument calculation can be explained with given input values -> 49 = 29+20.