1977 Tenerife Disaster
As we all know too well, two 747s collided on the runway in heavy fog at Los Rodeos Airport, Tenerife, in 1977. Since the PanAm aircraft was just taxiing, I would not have expected it to have its radar operating, but if the KLM plane was taking off, when would it have normally turned on its radar?
Had that radar been enabled on takeoff, would it have showed an aircraft ahead?