Don't engage them unless it is absolutely necessary. A Helix helicopter is on patrol north-northwest of your location. Spend as little time on the surface as possible. This is one of the more interesting missions. There are two Kilo class enemy subs in the area, a crippled friendly sub to rescue, a DSRV to deploy and recover, plus a minefield to watch out for.
Time is critical.
You have only three hours to make the rescue. Set a course for 360 degrees and make turns for 32 knots. This course will keep you safely east of the minefield. Upon reaching this point, set your speed to zero. The DSRV launches and recovers automatically.