You can't do that. I finished all campaign with all options turned off but external camera and map contact. The map contact replace the bugged stadimeter, is the only tool available in the stock game. If you turn that off.. u can go and do only fishing tonnage, nothing else.
More than that, I did not even managed to complete the first tutorial mission only with the stock game, simply because is no way to calculate the speed and bearing of a ship, all my torpedoes missed. You have no ship length in recon manual, the map tools can calculate only by 50 to 50 m, stadimeter is broken.... so there is no way to play 100% realism with the stock game.
After all these years, SH5 was downgraded. The stock game is now designed for kids and retards, align the dots and shot. You have to love Ubi
