Fitchant FLANK, is that from whence a cannon playing, fires directly on the face of the opposite bastion.
Rasant or Razant FLANK, is the point from whence the line of defence begins, from the conjunction of which with the curtain the shot only rasset the face of the next bastion, which happens when the face cannot be discovered but from the flank alone.
FLIE or FLY, that part of the mariner's compass on which the thirty-two points of the wind are drawn, and over which the needle is placed, and fastened underneath.