my pzc feature wish list

[JDR Dragoon]

Well, IRL:

If you lay a minefield, a sketch will be made of the extent, coordinates and composition (how many AT mines, how many AP, how are they laid in relation to ach other) of the minefield. The sketch is kept by the (engineer)unit itself and facsimiles are sent to the HQ of the unit the engineer is attached to/working on behalf of. This HQ is then responsible for further dissemination based on requests or perceived need of subordinate units.

So as you can see, there is plenty of scope for friendly units not knowing about friendly mines (not to mention artillery deliered minefields, whose extent and density might be wholly unknown)