I'm just going to go through the war chronologically, analyze each battle, and develop rules for each scenario as they come up.
The first is the Exocet attack on the Sheffield.
Over open water the British search radars and rwrs worked very well, picking up the Entendards and their radar as soon as they climbed above the radar horizon.
They also picked up the Exocets, but they couldn't get lock-ons with their FC Radars.
They had great inter-ship communications and could share Radar contacts via datalink - but human mistakes could nullify that completely.
Chaff seems to have worked very well when used properly by smaller ships - but left the missile free to acquire another target.
The Argentines knew the dangers of the British SAMs and fired on the first radar contacts they made.