Skimmers... they're those little helicopter-buzzy things down on planets, right? Dunno... Six... maybe seven? Can't remember, been so long since I killed one. Never done a mission to kill 'em.
Hate going down on planets, avoid it as much as possible. Landed at a planetary base yesterday only because the Feds gave me an ascension mission to go down there. Planets slow me down too much. The Feds even pinged me a time bonus if I completed the delivery in two minutes. Ha! That ain't gonna happen, matey. It usually takes me over a minute just to drop out of orbital cruise and enter glide mode.