Help Please bearing not correct

[NKVD-crazyivan]

Hi all i have GW installed+SH3commander+NYGM_persicop mod 1.2 this gives me the correct look for the periscop that sits down into the housing as it should on my 1X-C/40....(befor my attack peri and OB peri were showing at least 3-5 feet out fully depressed...

i have noticed how ever when i leave base and point my periscop or my uzo striaght ahead meaning zero degree on the hud read out above it will allso confrim this on my bearing meaning also zero..................degree..

but after say a battle etc i then piont my view to zero degree meaning were my bow-sub is facing and often it will read on my bearing as 10-15 degrees out......

eg my periscop says i,m looking at o degree but its confirms my headins as sometimes 345-or 010 it seams to not recaliberate it self as it should.............

any ideas or help would be great............

to fix it i swicth to manual and change my angle on bow to o degree striaght ahead then that will adjust my gyro angle the same then when i go back to my periscop and point at o degree the heading also displays the same........