[U-96]

1- Bold Decoys shoots a metal canister that contains a mineral that reacts with salt water, the effect lasts 2 to 5 minutes but don't rely on them too much. Basically use one to dive deeper at full speed, and do a quick course change before bringing the engines down to slow again and stay quiet.

2- Radar should only be used when the weather is really bad, (High fog and rain), You'll have a hard time seeing a boat even when it's only a couple hundred of meters away away from you, Your only hope of making a shot in these conditions are mastery of manual torpedo targeting and guessing where the target will be at any given time cause you certainly won't see it long enough. In decent weather. Your watch crew and hydrophones work well enough and they have the added bonus of being passive, so don't rely on radar too much.

3- I've tested my type VIIC's depth to 270 meters, But that's at 100% hull integrity, And getting hit with a depth charge at this depth is certain death. So you can take her deep, But keep in mind, it also scares the crap out of your crew and you'll have to manage the huge morale hit.

4- By late 1943 to the end of the war, Aircraft rule the atlantic. Nothing you can do about it except stay down often. a Schnorkel is a good investment as it raises your survivability exponentially. By late 1943, Patrols become an exercise of survival, and not a hunt. In order to stand any chance of sinkings at this point. try to transfer to a Flotilla that uses the type XXI and get one as soon as you can. By this time, if you lack a schnorkel or a type XXI boat. all you can do is pray.