Well, One-Nautical Mile in the US was 6,080.2 Feet up until 1954, when the US adopted the international standard of 6,076.115 Feet. It's the same as one minute of angle at the equator. You'll want to use 6,080.2 Feet as your standard.
That's 2026.74 Yards. So if you're having trouble trying to figure it out, it's one minute of angle at the equator.
So, I just remember it as:
1/4 NM: 500 Yards
1/2 or 2/4 NM: 1000 Yards
3/4 NM: 1500 Yards
1 NM: 2025 Yards
It's not exact but it's approximate (within 20 yards)
If you're measuring long distances, you won't see yards on your ruler line, it'll be in nautical miles, but if you want the distance just multiply 2025 by the number of nautical miles, and you've got total yards (approximately)
Note: In this game, one minute of angle is the same at every line of latitude or longitude; but in real life the further north or south of the equator you get, the shorter the distance between minutes of angle. You don't have to worry about that though.
If you can just remember 500, 1000, 1500, and 2025 you'll get good enough measurements to shoot something or navigate.
As far as being able to shoot something at distances longer than 1500 yards, you have to update the TDC.
What I mean is, you have to identify your target with the recognition manual before the Range selector will let you go further than 1500 yards. The stadimeter will get you a good enough range for a firing solution at distances under 5000 yards or so. If you're not using manual targeting you can't use the stadimeter.
If you're having any trouble I'd suggest going here
http://www.subsim.com/radioroom/show...146795&page=11
There's a whole lot of information there that will help you with everything you need to know to play this game at 100% realism and be successful. Try everything, and you'll figure out what works best for you.
Have Fun,
Corsair15
