Yesterday in a game I apply my knowledge, and got a very satisfied result
I was in a LA Flt I. After captured a "fishing boat" signal, I execute the first Ekelund ranging calculation. I found out the target was at 20nm away. Then I began a "sprint and drift" under the layer to get closer. In the process I was ambushed by a Foxtrot. After the threat was eliminated, I continue the trip. At 10nm away, I did the second Ekelund ranging calculation, it proved that my pervious range estimation was correct. I also ID the target as a Victor I SSN, finalized the solution with an updated course. Then I did a maneuver to get into the Victor's baffles zone. Get above the layer and double checked my solution about 7nm away. Fired two torpedoes at 4.5nm.
Mission accomplished