The problem is the presence of the nearby Krivak contact.
The Delta is inside the weapon range of the Krivak's SS-N-14. So the Delta goes 'Engaged Defensive', and turns away. The moment it gets outside the weapon range it turns onto its plotted course. This takes it inside the weapon range again, so it goes 'Engaged Defensive' once more, and turns away again. Repeat ad infinitum...
This is strange, because your Delta has Avoid Contact set to 'Inherited No', so I would not have expected it to be doing this. If I manually change it to 'No' just for the Delta it doesn't help, and the problem remains.
However, the Automatic Evasion setting is 'Inherited Yes', and if you change it to 'No', then the sub starts following your course.
So I guess SSBNs consider the simple presence of a ship with ASW weapons to be an 'attack', rather than needing an actual weapon in the water to trigger their evasion routine.
Edit: ultradave = ultraninja!
< Message edited by AndrewJ -- 5/23/2020 1:03:39 AM >