And please keep in mind that airplanes fly in certain corridors. If you're in there you will see flyovers.
But if you let a plane see you or, heaven forbid, mistake that laundry drier on the cigarette deck for an anti-aircraft gun
, then actually use it as such, you've really stepped in it.
Even if you shoot down a plane or two, before they die they will be on the horn to their flyboy buddies ringing the dinner bell. And YOU're the main course.
Don't be seen by aircraft. If you find yourself in a flyover corridor, get out of it. If you follow those two rules, there's nothing wrong with SH4 aircraft. Real sub skippers would probably have loved to download Webster's mod too. But they couldn't.