Hi!A question, especially addressed to real life pilots: what is the "usual" max visibility one can expect at medium-high altitudes, on a clear and non polluted day?I set it to 59 miles in ASV. I was wondering how much I can lower it without losing too much realism.Thank you!Marco

Realistic answer: There is no answer.Visibility can vary from light level to flight level, from area to area, even from minute to minute. If you're in the dry desert of North America, maybe 120 miles. If you're in muggy Great Britain, maybe 5.Mathematically, I think the answer is calculable, based upon height above the earth, elevation of the terrain on the horizon and te curvature of the Earth. Don't know what it is as 30-40 miles is abut all we ever get in the UK anyway! Allcott

It is a very rare day that I can see Mt Washington from Nashua, NH, which I think is about 50 or 60 miles. We rarely get more than 20-30 miles around here.ThomasN15802

Living in the desert, we often see the other extreme on dry, clear days. Flying out of Sky Harbor on my last business trip, I could clearly see the San Francisco peaks over 100 miles north while over central Phoenix. At night, sometimes the city lights of Vegas will appear at 200nm in the flight levels--I always see Vegas at night flying between SLC and Phoenix. Several years ago I was flying between Toronto and SFO, on a track which took us over Mono Lake before crossing the Sierra, and I could also make out Vegas in the distance.But add any humidity and vis. starts to sharply drop. I flew to Orlando in October, and saw no clouds the entire journey. But as soon as we hit east Texas, vis dropped sharply in the warm, humid October air. It was difficult discerning any terrain detail beyond 20 nm or so. On the ground in Orlando the sky looked blue, but in the flight levels, you'd think the entire city was socked in with haze.I would say on average, vis. tends to be 60nm or lower in most places I've flown RW.-John

I just wish MS knew this, John! Hopefully in their next version terrain and water won't look so ugly in the distance.

>It is a very rare day that I can see Mt Washington from>Nashua, NH, which I think is about 50 or 60 miles. We rarely>get more than 20-30 miles around here.>>Thomas>N15802It depends on the time of year. In the winter when the humidity is low and the air is crisp under an arctic high, I often fly to Laconia, NH from Massachusetts and can use Mt. Washington as a guide from 75 miles or further. I can often see the Boston Skyline on the way back. Same for Mt Wachusett and Mt Monadnock from the RI or CT coast, which is 75 miles at least. In the summer, you may only have 5 miles or less on a hot, hazy, humid day. It can get so bad that it's MVFR.