How can i fix this in GWX2???

[GoldenRivet]

Patrol 6... dead in 1942 by depth charges and extreme depth:

here is why. (sometimes this happens and sometimes it doesnt)

I dive down to 200 meters and im doing a fair job of sneaking away.

everything is going perfectly and eventually the destroyers loose intrest and start to leave the area. but then i notice that my depth is nearing 250 meters

the dilema: moving at "ahead slow" or giving the order to maintain "one knot" doesnt offer up enough speed to maintain depth... and as a result the sub creeps ever so deeper in an uncommanded descent. BUT if i order any faster than ahead slow the destroyers hear me and return to commence the attack.

this is exactly what happened to me just a few minutes ago. The sub kept creeping deeper and deeper and i was concerned about taking damage from the pressure of the depth so i blew ballast back up to about 180 meters. but once i reached 180 meters the sub began this slow plunge again. and WOULD NOT maintain depth unless ahead one third or faster was ordered... and if i ordered that speed the depth charge attacks were fast to follow.

now the questions:

1. Why does this happen some days and not others? there is no consistency in this event (no save game was involved in any way) one day i can hold depth at 1 knot and the next day im like a stone and i will sink from 200 to 250 within 5 minutes in the game.

2. How do i fix this? i have looked for the removal of the positive bouyancy aspect of GWX2 but have not been able to locate this.

3. Has anyone else experienced this problem?

4. If there is no way to correct this issue with GWX 2... how should i change my tactics so that i can prevent it from happening again?

the traditional "go deep and go slow" strategy doesnt seem to work in GWX2 because going slow results in the inability to maintain depth.

thanks