stockinette stitch: knitting stitch having alternate rows of knit stitches and purl stitches, producing a fabric as for stockings
knitting stitch: a stitch taken in knitting
static line: a cord used instead of a ripcord to open a parachute; the cord is attached at one end to the aircraft and temporarily attached to the pack of a parachute at the other; it opens the parachute after the jumper is clear of the plane