@Schwupps: initially yes it is perpindicular, but then i turn nearly parallel to their course to reduce the amount of time it takes to make the outbound turn and escape after the shots are fired. it is faster to turn about 45 - 90 degrees than it is to have to make a 180 degree turn after shooting. the idea is to get out of town before the shots impact and this technique simply reduces time spent turning away from the convoy.
@Sebbe02: Usually i blow ballast to about 40 meters and then order periscope depth. this greatly reduces the time required to reach PD. all of this should be done at ahead slow.
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