[Sailor Steve]

While it's unrealistic to reload externals in bad weather, the game does let you do it, which is much easier than trying to modify the game to make them internal. Also, having two extra internal torpedoes is also unrealistic.

Something else to think about if you play the most realistic game possible - even reloading internal torpedoes in bad weather was not possible, as maneuviring more than a ton of torpedo when the boat is bouncing around is highly dangerous. Internal reloads in bad weather were only done at fifty meters depth or more, so the boat would be absolutely stable.

Also they didn't reload while in combat, since steep dive angles would also risk the torpedo breaking loose from the harness. The procedure was to fire all torpedoes, try to escape, and only reload when it was absolutely safe.