[CapnScurvy]

With Optical Targeting Correction you follow the Recognition Manual's cues as to where to place the Stadimeter's water line image. Each ship can be different. OTC uses the most visible point, then has the reference point marked in red to indicate the spot. The reference point could be a mast top, funnel, super structure, flag mast, carrier flight deck.

Originally Posted by MCM

Do you take the highest end of a mast or do you take the highest line of the flag of an enemy ship?

greez
McM

That's just the reason OTC has several ships using the top of the flag (where it's attached to the mast) as their reference point. On some ships the flag mast is the tallest point, yet if you look closely at it, some flag masts aren't visible at all......the flag is just waving in the breeze. Where the OTC Recognition Manual has a national flag added to the picture, use the top of the flag's attached side (whether the mast is visible or not) for the height reference point.

All OTC height reference points are fairly accurate. On the contrary, the stock game and other mods have various measurements. Many are off by 30% of what they should be, some by 50% inaccurate.

Getting back to jlry's original question.....No the U.S. Stadimeter does not need to have the waterline lined up with the horizontal line of the periscope to take a reading.

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I realize this thread is nearly a year old, the first linked thread (Hitman's Tutorial for 100% Realism Manual Targeting, of 2007) quickly points out the problems the game has with measurements (least that's what Charos points out in the #8 reply):

Originally Posted by Charos

I see a problem :

In your example mast height is 66 Feet.

TDC Stadiometer range = 547 Yards.

Each Graticule marker is 0.25 Deg (Supposed to be that is)

Mast height = 7 Markers high.

7*0.25 Deg = 1.75 Deg.

Range = 66 Feet /Tan 1.75 Deg = 2,160 Feet. which = 720 Yards.


If you look at your game map thats how far your sub WILL be from the target .

Check it I will be interested to see what you find.


EDIT: To get a range of 1641 feet (547 Yards) out of a mast height of 66 feet

Would require a Graticule angle per marker of approx 0.33 Deg on the high range attack scope.

Or in your example 7*0.33 Deg = 2.31 Deg mast angle.

The problem was the height measurements are inaccurate, plus the Periscope's Graticule Marks (Telemeter Divisions) are inaccurate too! It's little wonder there were issues found with the games manual targeting from the very beginning. That's why OTC was made, to correct these inaccuracy's.

These may be older threads, but the problems with manual targeting are still evident today without OTC.