Glasgow Prestwick Airport ("GPA") is seeking to procure a new Primary Surveillance Radar (PSR) to be located on or in close proximity to the existing PSR site. GPA may alternatively procure new PSR and co-mounted Mode S capable Monopulse Secondary Surveillance Radar (MSSR) or may alternatively procure a new PSR and Wide Area Multi Lateration (WAM) Surveillance System.

The PSR and Secondary Surveillance solution is to be integrated to a Radar Display Processor (RDP) and Display System (DS) that is either an upgrade to existing RDP and DS, or an alternate RDP and DS, whichever is the most cost effective and provides best operational performance to Air Traffic Control (ATC).

This is explained in greater detail under the description of "lots".