US periscopes at night
So I've been reading Clear the Bridge! and they mention a lot about not being able to use the periscopes at dusk and through the night. Said when they looked through them it was just pitch black. I'm wondering if SH4 will be the same way? Does anyone know what the big difference was between the uboats periscope vs US subs that allowed the uboats to use their's at night?
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