'Combat control and air surveillance') in forms of STRIL 50 (operational in the 1950s) and STRIL 60 (operational in the 1960s, 1970s and 1980s) were integrated systems for aerial warfare control including early warning radar and ground-controlled interception.STRIL 60, designed in cooperation with Marconi Company, were in the very frontline of providing combat critical information to airborne aircraft, the Saab 35 Draken and Saab J32 Lansen fighter aircraft, by means of digital telemetry links with direct presentation of target guidance data on dedicated gauges on the cockpit instrument panel.The uplink to the aircraft could resist heavy jamming and the Swedish Air Force was first in the world to provide digital combat guidance that would remain reliable in a hostile and interfered radio environment.In the Stril 50 system with manual plotting and voice communication this had been 30–60 seconds.[2] Eventually, the Saab 37 Viggen aircraft system also utilized STRIL 60 but target presentation in the cockpit was then replaced by digital computer displays instead of the mechanical gauges used on the Draken.
