Hi all, I was just curious about which side of an APM detects when infantry is running past or near it. Like in this picture (sorry if it doesn't look like an APM ^__^;

:
__
\ \
|--| <-- (side of APM facing forward when dropped)
/_ /
is it the front, or the back?
I've always thought it was the front, but many a time I've been knifed due to an APM that didn't go Boom! when it had to.
Any help would be appreciated, thanks

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