Oh, I wasn't aware you can receive other ship's AIS position updates while your own system wasn't active. Even in that case, it's the same as the passive sonar

Oh, I wasn't aware you can receive other ship's AIS position updates while your own system wasn't active. Even in that case, it's the same as the passive sonar example I illustrated: the ship is there and you can see it, but they didn't avoid it anyway. Failure of communication.