IRAI is hard, too hard. By default, first thing I do after download is to ease the settings down to 8. From my painful experience I learned to avoid being 2 close to the targets. Only in the first campaign I attacked from inside the convoys, never since then.
Now, I only attack from long range. If I got steam torpedoes, things are complicated as the escorts will see the trail and alarm the convoy. So better is to shadow the convoy until the evening/night or until you have bad weather. I loose my fish at max distance and soon as the last one is on way, I back off at full power.
With the electric torpedoes I can attack at daytime, but I have to be really quick as the range is pretty close. With the acoustic torpedoes I dont even bother to calculate much, just set the bearing and shot a salvo. They do the rest all alone.
Point is that if an escort detects you, ur good as dead. Almost impossible to escape. Not with IRAI. So attack at night/low visibility if you have steam torpedoes and always try to stay at max range. Soon as the last torpedo is in the water, back off at max speed. Dont turn, thats just waste of time.. just back off at max speed. Reload and start over the chase.
While shadowing a convoy, is always good to report contact. If there is a wolfpack or any friendly unit in range, they come and engage the enemy, true story.
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