In an old career using the stock version I once managed to total over 1.000.000 GRT.
After playing with GWX3 for around 3 years now this total will likely be lower,but i'm still racking up some decent tonnage
I play with 85% realism and manual targeting.The only things I keep on are:
- map contacts (its realistic for your watch officer to provide you with contact updates while you attend to other tasks.Why do you think the officers are even IN the game?,to assist you when needed)
- stabilize view (German optics were very good)
- external view (I sometimes like to watch my UBoat in 3rd person,but NEVER use it in a plotting or attack scenario!)