After clearing the North Atlantic and Antarctica campaigns I have come across another mission that seems to never end, again because it is not clear what the game exactly wants from you.

You are supposed to: (1) wait for your wingman to collect samples; (2) deploy a transponder inside the enemy zone and (3) run away before it starts transmitting.

Only, I cannot for the life of me figure out where the transponder should be deployed. Passing Waypoint 1 automatically triggers the "deploy transponder" message from my wingman. I have tried firing it at Waypoint 1, 2 or 3; underwater or at the surface; next to an enemy sensor or far from it. I tried to destroy the sensors, I even got detected on purpose and managed to destroy the attacking subs. Nothing: the transponder just self-destructs after a while, no matter whether I have run away or not.

Anyone managed to crack this one?

Thanks