I posted a tutorial regarding this about 2 years ago:
http://fhpubforum.warumdarum.de/index.php?topic=17088.0 Glad to see the 3D-Map it on by default now.
One thing that has changed in 2.46 is the "Setting" of the AP Mine.
In 2.45 - You could goes prone, start fixing the mine to set it, stand up & run for about 1-2 sec,
then when i heard the click, it would fall where i stoodIn 2.46: Once you start
"Fixing the Mine to set it", it is SET wherever you started.
No More free time to fix it.
Both of which are improvements (Default 3DMap Activation-New "Setting" of the AP Mine)
Good squad leaders or members remind their squad to ensure their 3D Map is ON or to beware of S-Mine locations.