"Peter Duniho" wrote in

He opened with an insult of the other replies. How else would you suggest
I interpret ......

Perhaps by considering, as Bob as already pointed out, that he and ramapriya
may well be referring to an aspect of aviation you, and others, are not
considering. While 121 does not specifically proscribe multiple concurrent
type operations, most airlines' opspecs do, and as you well know, a
carrier's opspec carries the force of, indeed becomes part of, the FAR for
that carrier.