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Originally Posted by Wildcat
If you line up the waterline exactly with the top of the mast it'll usually be accurate to within 2000 yards. That's the trouble with computer games, the resolution is not high enough, so a pixel movement of 1 or 2 pixels could represent a distance of 5km. That's why it's best to zoom in to maximum on targets when you take a scope picture.
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(try the highest structure, and not the highest mast, Wildcat, and tell me what you think about)
and the most annoying thing now is the roll of the ship !
when in high sea, its really difficult to put the d*mn lower mark on the waterline !
especially at long range, where it's just a pure waste of time to find an accurate range with this roll that prevent you to have an accurate mark set at waterline.
When some pixel could X2 the distance (especially at long range of course), you should take a lot of care to have a good picture, and you need to do it again and again until this mark is exactly at the waterline before going to stadimeter.
One other way is to "compensate" :
I couldn't take a clean picture because my ship is rolling too much =>
so i see my lower mark is ~5 pixel under the waterline => I just have to put the upper mark 5 pixel above the highest structure.
Much more easier to say than to do in fact ...
Last thing, very important
the earth is not flat (Hooo you knew it ?!
)
And this is simulated in DW (ha ... did you knew that ?!
)
So, if the target is far from you, you must put the lower mark UNDER the sea level, because the sea level here is NOT the waterline of the target.
So you have to make an evaluation of where is the real waterline of the ship.
This is mostly for small ship, like fregate, where freeboard is quite low on the sea.
Sometimes you don't even see the hull !
In that case, this mean anyway you are too far to make any accurate stadimeter measurment, so just wait the target close your ship.