Deckungswinkelmesser

[SOT(D)]

Deckungswinkelmesser...how are they used? I am well versed in map use, but I wish to know how these function.
Anyone know?
Thanks!

[Aiceman]

Hi!
The deckungswinkelmesser is a very cheap and accurate instrument for determining heights. A dashed line in the bubble level of the cover angle meter achieves an angular resolution of approx. 0.6 degrees (with practice also 0.3 degrees), which corresponds to 10 or 5 lines. The maximum positive and negative measurement angle is 500 mil which corresponds to a circular angle of 28.125 degrees. This results in the measurement object being twice as far away as it is high.

Due to the main military field, not the usual 360 degree division was used, but the artilleristic line. Here the full circle is divided into 6400 mils.

The angle can also be used to determine the height at a known distance to the measurement object via the tangent. On the other hand, at a known height, the distance can be roughly determined.

(maybe you understand it, I found it in only german language..sorry)

This item used in WWII and after in the BW but easy to indentify the period one

[SOT(D)]

Thanks!!

Aliceman,
Thanks, ever so much. The information you provided is great, and I believe I can figure it out. Mils should not be too hard to determine. One question...in the directions of the page from the manual ( love to get a copy of that!), it states that the zero line is always horizontal. Does that actually refer to the line being always on the HORIZON? Just curious,
Thanks again,
Mike

[timg]

Hi SOT(D)

Nope,

zero just means/always horizontal. You could zero a theodolite to horizontal, however when viewing through it you might not see the horizon.

Don't forget this is for measurements for firing at a target, from where you are the target may actually represent a below horizontal aspect, resulting in the calculations for adjustment of fire.

Regards

Tim