ILS Glideslope Height RNAV
For ILSILS —Instrument Landing System glideslope height questions, there are three methods to solve the problem:
- Use trigonometry. This gives the most accurate answer, but is time consuming and requires converting between nautical miles and feet.
- Use ; this is slightly quicker and slightly less accurate, but also requires converting units.
- Know that for every 1 nm on a 3° glideslope, your height will be 300 ft. This is the fastest and most efficient way.
To use the fastest and most efficient method:
- Multiply the number of nautical miles from touchdown you are by 100.
- Multiply the answer by your glideslope.
This will give you your height.
Expressed as a formula, this is where is your height in feet, is the number of nautical miles from touchdown, is your glideslope.
Get instant access to
Start your free trial today.
Prefer multiple choice questions