Well, Herr Kaleun, your Navigator Konrad Schlumberger has been asigned to command his own U-Boot.
But during the last shoreleave Heinz Voigt - your hydrophone operator - visited the new hydrophone operator seminar at the U-Boot school in Kiel.
He came back with some great skills to support you in hunting contacts only with hydrophne.
He is able to calculate most of the tricky stuff to get the real courseline of an inbound contact under those conditions where the initial angles between the first three bearings are small. It indicates the contact is sailing along a course coming close to your position.
Heinz will give you constant reports of the bearings, including the information whether the contact is closing in or whether it sails in constant distance.
At the bearing this information changes, the AOB of the incoming contact is 60° (!).
Additionally Heinz reports proper distance statements and tells you if the contact is far away or at medium distance.
Whatever occurs first - note its bearing on the map. Draw a circle to represent the medium distance around your U-Boot.
(please someone provides the information what distance is medium in GWX - I changed my settings in Contact.cfg and didn't back up! I guess it was 8000 meters, but I'm not sure.)
At the time you have both informations, copy the courseline of the 60° AOB to the "medium distance" bearing at the point it intersects the medium circle.
You may want to change your position if the 60° AOB information comes first, of course heading perpendicular to the "courseline", to ensure the contact will cross your medium distance circle.
Well, the rest should be easy...
