I stand corrected. You are right about TCAS I.
But TCAS I? That should have gone out with the ark. Even TCAS II with v7.0 software is only a short term interim solution to the full intent of European ACAS requirements. In US airspace TCAS II with v7.0 software is the current standard for heavy public transport machines. It ought to be standard for all aircraft everywhere but of course, safety has a price that politicians are not willing to pay. Cheap travel for the masses is far more important.
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Through difficulties to the cinema