Quote:
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Originally Posted by tater
^^^
in RL, the sight is not set vertically on the target.
Panther, you set the direction (bearing) you want to shoot, and you set the range (the gun does this in stock SH4).
Since range on a gun is a soley function of the elevation (assuming a cartridge gun, and not adjustable powder charges), you need to know that the deck is level (in both directions unless you are pointing exactly along an axis) because the elevation of the gun tube is the setting on the mount (the range value you see in the sight) plus/minus the roll of the deck.
If you need a 15 degree elevation to hit the target, and you shoot with the deck on a 30 degree roll, you just shot at 45 degrees.
So the sight was LEVEL with the deck. When the sight is level with the horizon line, you know the deck is level, and you shoot since the round will then land at the range you told it to.
tater
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Tater - thanks for the explanation and for helping out with this. I probably wasn't thinking (or writing) as clearly as I might have the other night. Now that I think about it in light of your comments, perhaps a better way of expressing my point would be to say that, at any given elevation setting,
both the gun
and the sight should be "locked" to the deck (and therefore, to each other as well), since both the gun barrel and the sight should be pitching up and down in the same manner as the deck as the sub rolls (or pitches, for that matter, but that's an extra complication for another discussion). Thus, I was getting a little confused by the talk about de-coupling the gun and the sight in terms of their rolling action. Of course, the gun barrel needs to be able to move (elevate) independently of the sight/crosshairs
when you change the elevation setting, but then once any given elevation has been selected, the gun barrel and the sight should pitch/roll together along with the deck.
Although I didn't have time to do much testing, it seemed to be working that way the other night - I could (and needed to) elevate the gun to hit at farther ranges but the crosshairs did not seem to go higher above the horizon when I did so (maybe I just didn't notice since I didn't try any very long ranges?). Yet, once I had set the range/elevation, both the crosshairs and the gun barrel seemed to rise and fall together with the roll of the boat about as you would expect (based upon the fall of the shells short and long).
Thus, I'm still puzzled a bit about what further "de-coupling" might be needed here.