HI-LO-HI: A flight profile that makes use of fuel-efficient high altitudes going to and from a low-level
Intermediate Checkpoint: A pilot-chosen checkpoint between the AP/1B checkpoints of a Low-
Level High-Speed Training Route.
Jet Navigation Chart (JNC): A Department of Defense navigation chart for use at very high
altitudes; scales 1:2,000,000.
Jink: A defensive maneuver in three dimensions.
Joint Operations Graphic (JOG): A Department of Defense chart for precision work such as
locating a target or computing loft bombing pull-up point; scales 1:250,000.
Landmark: Terrain feature used to visually navigate.
Low-Altitude, High-Speed Training Route: FAA authorized corridors where the 250 KIAS speed
limit does not apply; floors, ceilings and lateral boundaries are defined in FLIP AP/1B.
MEF: Maximum elevation figure; the tallest object in a grid of a chart used in low-level navigation.
MFR: Minimum fuel required; minimum fuel to complete an entire route from a checkpoint; on the
low-level jet flight log.
Navigation Plotter: Also known as Weems plotter; used for headings and distances; may have
statute miles rather than nautical miles. See also combat plotter.
No Joy: No sight (or lost sight) of target.
Operational Navigation Chart (ONC): A Department of Defense navigation chart for use above
5,000 AGL; scaled 1:1,000,000.