Which type of SID requires ATC to provide radar guidance?

Vector SIDs, or Standard Instrument Departures that require radar guidance, are designed to facilitate a smooth and efficient transition from departure to en route airspace while utilizing radar services. This type of SID is used when the air traffic control facility needs to give pilots guidance in real-time as they depart from an airport.

When a Vector SID is in use, pilots are typically instructed to follow specific headings or receive vectors from ATC, allowing for more flexibility in navigating around obstacles or managing traffic in busy airspace. This guidance helps ensure that aircraft safely and efficiently follow the intended departure path.

In contrast, the other types of SIDs, such as Pilot Navigational SIDs, Standard Use SIDs, and Autonomous SIDs, do not require ATC to provide radar guidance throughout the departure. These types rely more on the pilot's navigation capabilities and can be flown independently without active direction from controllers. This makes Vector SIDs unique in the context of requiring radar guidance to support the safe and effective management of departing aircraft.