AFTER the loss of sheffield, the policy was changed such that each class 42 was escorted by a class 22 (with sea wolfs).

The Argentian navy did hit Glamorgan with an exocet after that, but Glamorgan wasn't anywhere near anything with Sea Wolf defenses at the time.

The 'friendly' aspect is likely apocryphal, and possibly based on the fact that the Glamorgan and Antrim were both exocet missile destroyers themselves, and might thus have had issues with targetting a missile of the same type. But since neither of them had any point-defence systems it was moot.

edit: or it may be from the fact that Broadsword's sea wolf system 'locked up' during the sinking of Coventry, and was unable to attack the inbound A4s that bombed Coventry. But from what I can see, the prevailing belief was that it was unable to lock on for the same reason Sea Dart on Coventry wouldn't - it couldn't discriminate the A4s from the land behind them.

Joking aside, I would assume current IFF systems let you define anything not explicitly friendly as hostile - what with shifting alliances, armament development consolidation &c - the issue being how many backdoors there are. I take it as a given no US-made missile can kill a US-operated aircraft, regardless of what the operator of the missile desires. (Same goes for French, British, Russian &c)

I'm not so sure about that. That would require that all US made missiles have a "disarm" signal that the operators cannot override. Maybe for weapons we sell that is okay, but for our own use, that strikes me as too much of a liability if that signal ever gets compromised and spoofed.

Every single weapon can be turned on its maker, somehow. Else, its not an effective weapon.

Edit: Note that I’m working off of very old memories, and the 60 minutes reports may not have been accurate.