Question about Sub evasion mission in 688 Attack Sub (the 1989Sim)

[Erik1]

Hello everyone,

im quite new to this forum but anyway hope someone is able to help me here.
I recently dug out the old 688 Attack Sub sim and started playing it again in DOSBOX.Works great and im having a lot of fun with it ,but im stuck in the missions where u have to evade soviet submarines without sinking them.
The mission orders say roughly: enter the atlantic and shake those subs, u mustn be any longer detected by them when u reach the atlantic.
Well here s my Prob:

How do i know wether they can still detect me or not??( I never know if I did loose them or not)

I read the game manual time and again ,there are a few tactics mentioned how to loose a sub on your tail.I tried them all.Then sneaked low speed towards the open sea,just to have my mission aborted in the end and to be told that those soviets were still on my tail..

It would be great if anyone could help me with that.Hope someone around here is still playing this old sim and remembers a thing or two about it.

Thanks anyway and have a nice day everyone,

Eric