*The protractor affects the unfinished Dioptra quality and ultimately the finished quality.
*Quality of Dioptra affects how long you can plan a bridge.
*Required quality is quality x 0,4 per bridge tile. This calculation is both for survey and planning.
*Starter compass can be used.
*The Dioptra has a relatively high value and is worth the same as, for example, mooring ropes and door locks of equal quality. [[Get price]] = QL^2 * 0.50.
* [[Sight]]
* [[Protractor]]
{{rare}}
Rarity on dioptra affects the distance of the bridge that is being planed.
[[Category:Bridges]]
[[Category:Babel/D]]