Flight Training Central

JANUARY 10, 2025

As an example, the Garmin GTN series offers a vertical calculation (VCALC) function that includes the ability to set a desired rate of descent to calculate the appropriate point to begin your descent based on your aircrafts current groundspeed. In our example: 167kts / 2 = 83.5 Convert to mileage from destination if desired: To convert 13.2

Descent 98

Descent Groundspeed Flight Plan AGL 98

Plane and Pilot

NOVEMBER 27, 2024

Often, turbulence is the harbinger of mountain waves, not the ideal ceiling—and visibility unlimited—day. FAA weather charts can help for higher altitudes but when just a few thousand feet agl, they may be less useful. We experienced moderate turbulence even at our gate. I flew into that and the venturi effect that day.

Turbulence 97

Turbulence Weather Knot Descent 97

Air Facts

APRIL 29, 2024

At the current groundspeed, I believed it shouldn’t be of much concern unless the cell began producing lightning. I immediately leveled off at around 650’ AGL, and began slowing down. I had seen these clouds associated with turbulence before, but all appeared to be calm. miles northeast of the airport in reduced visibility.

Descent 98

Descent Approach Weather AGL 98