True Position

[[Me...]]

Hello guys,
You can explain me the case of this true position?
Thanks!

[[Cl...]]

First off you have only Y ticked. The FCF calls out diametric TP, so you need to
tick Z as well. The primary datum is -Z- not -WB- You need to make the secondary
datum (-WB-), and -C- as the tertiary. Calypso calculates the two coordinate deviations
using Pythagorean theorem.

https://en.wikipedia.org/wiki/Pythagorean_theorem