well, this was a fun one :
http://darkmere.wanfear.com/tmp/hiddenbot01.jpg
http://darkmere.wanfear.com/tmp/hiddenbot02.jpg

its a defbot, but I don't know what nation. (NT prolly) in Dau O-11

This afternoon I was attacked by an invisible bot. Could not be seen, did not
show on radar. But it's shots were very effective...