[LoBlo]

I'm not certain, but iirc there is some sort of mock "coming to radio" depth modeled in the game to simulate updating link data, but the AI subs don't deploy mast. And no, mast are not radar detectable in game, neither are the sub sails out of the water.

If you would like to script the subs mast being detected you could...

a). script the sub to surface completely. That would insure that it would be detected and the sub would show up on radar. Even though its not totally realistic its a compromise to get the mission plot to playout like you wanted. After detection, the sub could be scripted to dive again to a shallow depth, to prevent it being shot at by a SSM.

b). script the sub to come to a shallow depth at a point. And then script the FFG to receive a verbal message from the crew.

trigger "sub comes to com depth" fired.
trigger fire, send message to FFG: "Conn, EW. I'm picking up a faint signal sir. Bearing xxx, range x yards. Could be a submarine mast sir."

The player would then have to manually plot the coordinates given in the message and proceed from there.

c). script a small unimportant object to appear that is radar detectable, and then disappear whenever the FFG detects it.

trigger: create dynamic group
trigger: when detect object with FFG radar, then remove dynamic group.

That's all I can think of atm. Personally I like the option (b) the best. Its adds an element of role-play to the mission, IMHO, whenever the crew is scripted to verbally relay's information to the Capt. Hope that helps.

lb