Visibility under various weather conditions?

[Kool Kat]

The manual does not have a word about VV. Was VV once a non-optional new feature? Is that what the description is about?

I believe what you state is correct. I believe it was in JTCS update 1.03... both VV and EA were "standard"... and than because of the uproar these rules created in the JTCS community... Jason came out with a 1.04 update that made both these controversial rules "optional?" :chin:

The game manual has not been updated - hence the text that reflects the original variable visibility as a "standard" rule.