FS stands for which leveling term?

FS stands for which leveling term?

• A. Foresight
• B. Backsight
• C. Height of Instrument
• D. Turning Point

Answer: (A)

FS stands for foresight, the forward staff reading taken at the next point ahead of the instrument in a leveling run. This reading, used with the instrument height, lets you determine the elevation of the next point by subtracting FS from HI. That forward reading is what FS denotes, making it the best answer. The other terms refer to different things: backsight is the reading that establishes the instrument height, height of instrument is the reference height used for calculations, and turning point is a fixed reference point used to reorient the line of sight.

FS stands for foresight, the forward staff reading taken at the next point ahead of the instrument in a leveling run. This reading, used with the instrument height, lets you determine the elevation of the next point by subtracting FS from HI. That forward reading is what FS denotes, making it the best answer. The other terms refer to different things: backsight is the reading that establishes the instrument height, height of instrument is the reference height used for calculations, and turning point is a fixed reference point used to reorient the line of sight.