There was another test in Ontario Wednesday morning of the television Alert Ready System run by the government via the broadcast regulator, the CRTC. Few people know about the system and those who do may know how it might be applied. But when it is tested, it takes over television arbitrarily as it did today. The test occurs without warning and in successive repetitions for about 20 minutes. The type of event which might require the use of the Alert Ready System would surely be catastrophic — a nuclear attack, a widespread biological attack or possibly Martians.