The Civil Aviation Authority’s Directorate of Airspace Policy (DAP) provides the focal point and Secretariat to the Cabinet Office sponsored National IFF/SSR Committee (NISC) which is responsible for the policy, operation and licensing of IFF/SSR interrogators in the UK, including ACAS I collision warning systems.
DAP also provides the focal point for the implementation of Mode S SSR in the UK and is responsible for the management of the UK SSR code allocation plan.
NISC
