A question about Operation Sealion

[Afro Thunder]

I'm talking about the (huge) scenario made by Jason Petho, which describes the entire (hypothetical) operation. It's a 100-turn monster and is basically a corps-level scenario. My question is: How much visibility should there be for the first few turns of the scenario? The way it is currently set, the paratroopers land in daylight and the landing barges get bombarded by Brit coastal artillery long before they can hit the beach. Now, keep in mind, I don't mind blasting away at slow moving barges loaded down with troops, but would they drop paratroopers during what is clearly daylight? I think there is a way to have dynamic visibility in the game, by changing a few numbers in the save file. I'm wondering though, whether or not that would be accurate.

Thanks.