How do you calculate the rate of descent for a 3-degree glide slope?

How do you calculate the rate of descent for a 3-degree glide slope?

• A. Ground Speed x 10
• B. Ground Speed x 2
• C. Ground Speed x 5
• D. Ground Speed x 0.5

Answer: (C)

To calculate the rate of descent for a 3-degree glide slope, you can use the formula related to your ground speed. The proper approach is to multiply your ground speed by 5. This is based on the fact that on a 3-degree glide slope, for every nautical mile you go horizontally, you descend approximately 300 feet vertically. Ground speed, when expressed in knots, directly correlates to the rate of descent at a 3-degree angle. Thus, if you take your ground speed in knots and multiply by 5, you’re effectively converting that horizontal distance into a vertical descent over time. For example, if your ground speed is 100 knots, the calculation would yield a rate of descent of 500 feet per minute, which ensures you maintain the correct glide path toward the runway. This conversion assumes a consistent and stable flight path that adheres to the glide slope requirements, making it essential for precision approach and landing procedures.

To calculate the rate of descent for a 3-degree glide slope, you can use the formula related to your ground speed. The proper approach is to multiply your ground speed by 5. This is based on the fact that on a 3-degree glide slope, for every nautical mile you go horizontally, you descend approximately 300 feet vertically.

Ground speed, when expressed in knots, directly correlates to the rate of descent at a 3-degree angle. Thus, if you take your ground speed in knots and multiply by 5, you’re effectively converting that horizontal distance into a vertical descent over time. For example, if your ground speed is 100 knots, the calculation would yield a rate of descent of 500 feet per minute, which ensures you maintain the correct glide path toward the runway.

This conversion assumes a consistent and stable flight path that adheres to the glide slope requirements, making it essential for precision approach and landing procedures.