Quote from Pyth0n: “I will assume these ships are frigates. Are the ships for sure in the blue patrol circle? Because maybe the patrol area is smaller than the AA Range. Not sure tho... ” No frigates, only cruisers and ground unit transport ships. The air units were right above them and didn't engage.
Quote from Pyth0n: “Which air units are they? ” Gunships, Attack helicopters and Naval Patrol Aircraft. Either in squads of their own or mixed, no combo engages automatically.
In a ww3 4x game, patrol of helis or NPAs are not automatically engaging surface vessels and transports. War diplo condition is active since we get hit by ship anti-air. Game no: 4124518