What does "descend via" mean in an approach procedure?

In an approach procedure, "descend via" refers to an instruction allowing the aircraft to follow the published routing and altitude restrictions associated with a Standard Terminal Arrival Route (STAR). This means that pilots can begin their descent according to the specified altitudes indicated on the STAR, which are designed to guide the aircraft safely to the destination airport.

Choosing to "descend via" acknowledges that the pilot must adhere to the altitude and speed constraints outlined in the STAR. This approach not only helps maintain safe vertical separation from other traffic but also aids in the efficient flow of air traffic into busy terminal areas. The inclusion of this phrase in an approach procedure is crucial for both compliance with air traffic control and to facilitate smooth arrivals.

Understanding this concept is vital for pilots as it directly influences their ability to execute arrivals and approaches effectively while adhering to safety protocols.