theres a old thread for this somewhere but its still usable after the last two patchdays.
if you leave a battlemap like "Deep Space Encounter" and have choosen to select yourself wich instanz you will deployed you are able to make yourself invisble by cancel the procces.
If you do that you are able to attack without beeing seen or attacked.
press button "Exit the sector"
press button "Yes"
press button "cancel"
attack the nearest enemy without seeing yourself, moving is guessing .
ps english is not my mothertounge..hope its not too bad ^^