Thank you very much Sir, I really appreciate it.
So if I understand correctly, I must locate and close to within 3nm of sub, and remain there for minimum of 15 minutes, and the sub will not surface until 19:00 or 18:30, depending on type.
I did sink the Foxtrot once, it gave me a mission incomplete

I will run it again, following your guidelines.
Again, thanks very much, this is what the forums are really for in my opinion- helping others with less experience to enjoy the sim!
Swims