Matching

Matching was the primary method for gathering target data used by the U-boats during WWII, known as ausdampfen. The principle is very simple, once the target is spotted, you adjust your course and speed until the target remains at a constant bearing and constant distance. This is most easily done when roughly abeam the target, but can be done from any position. While at the side of the target, point a periscope, or the UZO at the target to be matched. Observe whether the target is moving forwards or backwards, and use the 10 faster/slower to fine adjust your speed. At the same time adjust your course until the target is neither growing or shrinking in the optics using the milliradian scale. Alternatively you can stay at the limit of visibility, and strive to keep the target at a constant level of "haziness". Historically the crew would have kept the mast tops just visible above the horizon, however wolfpack does not model the curvature of the earth, so this is not possible in game.

The longer time you spend finetuning your speed and course the more accurate it will be, though keep in mind that on hard difficulty the convoy will periodically change their speed and course, and thus your solution might be invalidated if you take too long. The speed and course of own ship should now match the target, and can therefore be transferred to the TDC. The speed can be read at the helm in the control room, or on the navigation chart. To set AOB point your selected targeting device at 0 degree relative bearing (straight ahead), and set the AOB dial to 180 degree. The AOB and speed should now be valid for all vessels traveling at the same course and speed as your target.