Thank you for the Nice Welcome everyone...and even Thank you for the nice suggestions ..already tried Trigger Maru and Travellers Mod
But i have a little Question with them.
I am still a noob with submarine games and i realised when i start a campaign from pearl harbour to the japanese coast my fuel runs down real quick. When i arrive there i almost have an empty tank...is it possible and yes i tried it in gameplay settings to turn it of the decrease the realism a little like unlimited fuel and stuff? like i said i tried to deactivate it but somehow it wont work ingame ..i still lose fuel when i drive with my Sub.
Thanks