When in 3rd person view, APERS mines appear as a small rhombus on the floor. If you change the angle slightly towrds the mine there body will seem to "appear".

This makes you less able to spot them in 3rd person view that in 1st person:
-In FP view the mine will appear complete (and easy to spot) just before you enter it's detection radius.
-In TP view by the time it shows you are already on it, and potentially dead. {F19079} {F19080} {F19081}