How to calculate ACCURATE range without having to use the stadimeter?

[GinoC]

Originally Posted by Paul Riley

16-18000 metres? and,the stock game vis. limit is on a clear day about 8-9000m.That is about double,is that correct then?,that is bloody far
Would someone be able to see that far with the naked eye?

On a very clear day, you can see the superstructure of another ship above the horizon with binoculars at 15 NM or ~28km. That being said, how much you can see all depends on your height of eye above the surface. I can't imagine a Type VII could have been much more than 5m or so. That would give you a distance to the sea horizon of 8km. Anything further than that would start to dip below the horizon.