Other strange things... I'm on a patrol with a Gato, with air search and surface search radar. In the beginning, I got radar warnings about aircraft. Now, I usually notice them when they are in visual range, which usually prevents diving in time before they attack.
The sub has been damaged during this patrol, but no damage is shown to the radar equipment, not in the game itself, and not in the external damage analyzer program
(
http://www.subsim.com/radioroom/showthread.php?t=114405 ).