Black Hawk called them "go-bys". "Out of the corner of your eye you see something move. But when you look it has already gone by. A go-by."
(Excerpt) The massive ship maintained a vibration that rendered it invisible to the senses. Its outer surface was studded with 364 annex hatches. Some were vacant, others--occupied, the powerful blue-white rim lights of the drone ships pulsing steadily. In one of these he sat, studying her pattern at the console, familiarizing himself with her glyphs...waiting...