Thank you VERY much.
Will try it as it is, but I already see I have some doubts, If you don't mind I'd like to understand it before I demand my men understand it as well.
Set_Time_Compression,2,0,0,0,0,0,0
Why set time compression? Couldn't it just run in any time compression user started it?
Ahead_standard,0,0,0,0,0,0,0
Could it be speed given in knots instead of steps? I travel at most fuel efficient speed of 7.5 and I want it to stay this way. How to specify it?
Activate_NavMap_Station,0,0,0,0,0,0,0
Why activate? Couldn't the script just run in any station I'm currently in? I hate when scripts move me.
Set_new_depth,30,0,0,0,0,0,40
Which values do I change to set it to 20 metres?
All_stop,0,0,0,0,0,0,5
Seems clear, but what is the 5 in the end?
Hydrophone_normal_sweep,0,0,0,0,0,0,20
Report_nearest_sound_contact,0,0,0,0,0,0,20
20?
Ahead_standard,0,0,0,0,0,0,1
1?
Surface,0,0,0,0,0,0,5
5?
Set_Time_Compression,128,0,0,0,0,0,7200
Seems I understand the 128 value.

But what is 7200? Looks like 2 hours expressed in seconds.
Loop,12,0,0,0,0,0,0
12?
Set_Time_Compression,0,0,0,0,0,0,5
Also - can it be made to drop TC to 1 and/or play a sound when anything is heard in hydrophone?
I'd love to understand more of this, but I don't even know where to look for info.
EDIT: I chose the easy way and installed your mod. Thanks again.

Will probably corrupt it by trying to edit, hehe.