What does it mean when ATC tells me to "Descend Via"?

When ATC instructs you to "Descend Via," it means that you should begin your descent following the vertical and lateral path defined by the Standard Terminal Arrival Route (STAR) that you’re flying. This instruction is specific to the altitudes and speeds published on the STAR chart, ensuring you descend in a way that aligns with the expected traffic flow and sequencing for arrival.

Here’s what you should do:

1. Follow the STAR: Adhere to the lateral navigation path of the STAR, which includes waypoints and any specified altitudes and speed restrictions.

2. Manage Your Descent: Descend at your discretion but comply with any altitude and speed constraints along the way. The “Descend Via” instruction gives you the flexibility to manage your descent rate while ensuring you meet the required restrictions at each waypoint.

3. Stay within the Limits: Ensure you’re within the altitude and speed limits at each waypoint. If you’re unable to comply with any of the constraints, you must inform ATC as soon as possible.

"Descend Via" is designed to standardize and streamline the approach process, reducing the need for additional ATC instructions and helping manage the arrival sequence efficiently.