OVERVIEW: The Watchman is a medium-range radars S-Band radar designed to provide terminal area/approach surveillance and ground controlled approach surveillance.
DETAILS: The Travelling Wave Tube- based transmitter provides frequency diversity and frequency agility and enables a single radar to provide a variety of detection ranges out to a maximum of 222 km. The transmitter is available in a single tube format or with multi-tubes which accommodates the �graceful degradation� often required by the operator.
NOTES: The Watchman surveillance radar system provides Air Traffic Services for the vast majority of the UK Ministry of Defence operational stations in the UK and worldwide. The Tactical variant (mobile equipment) of the Watchman system allows the rapid deployment and installation of Air Traffic Services for British forces.
SOURCES:Grundlagen der Radartechnik. "Radar Basics." Accessed December 1, 2013. http://www.radartutorial.eu/19.kartei/karte219.en.html