Is it possible the Han is positioned too far north to be detected? Or is it possible the the time limit is too short? I suspect the former, since you're trying to showcase the bow mounted sonar rather than the towed or hull arrays.
It seems that since the 1.14.4 update, the submarines controlled by the AI do not respect the manual depth assigned to them.
In the case of the Han,it should travel as deep as possible about -984 ft.Instead, it travels just above the layer at about -355ft.
If you load the scenario with the editor and run the scenario on the China side you observe that the Han travels at -984 ft, which makes its detection with the towed array possible.
If you stay in China side and run for 2 hours and then come back to the United Kingdom side, you notice that the Han has been detected.
Now if you restart in United Kingdom side with "God's Eye" view enabled, you can see that the Han goes back to -355 ft, making its detection impossible if you stay just above the layer.
If you want to detect the Han above the layer with your towed array, stay 0°,creep and climb to -131ft (Shallow) to allow your towed array to search over the layer.
< Message edited by TyphoonFr -- 9/7/2018 6:31:57 AM >
To all English teachers of the forum, sorry if English is not my mother language.