text: Tactical Control Measures
  Checkpoint
  A-18. A checkpoint is a predetermined point on the ground used to
  control movement, tactical maneuver, and orientation. Checkpoints
  are used by all units in all types of operations. Units may use checkpoints
  to supplement or as substitutes for phase lines. Units can also use a
  checkpoint as a fire control measure in lieu of the preferred control
  measure, a TRP. Figure A-7 depicts CHECKPOINT 13.
  Contact Point
  A-19. In land warfare, a contact point is a point on the terrain, easily
  Figure A-7. Checkpoint 13
  identifiable, where two or more units are required to make contact (JP 3-
  50). A commander establishes a contact point where a PL crosses a lateral boundary or another identifiable
  terrain feature as a technique to ensure coordination between two units. The commander provides a date-time
  group to indicate when to make that physical contact. Figure A-8
  depicts CONTACT POINT 8.
  A-20. If both units are moving or are stationary, the mutual higher
  echelon commander normally designates the location of contact points
  and times of contact. When one unit is stationary, its commander
  normally designates the location of the contact point and the meeting
  time and transmits this information to the commander of the moving
  unit.
  Figure A-8. Contact point 8
  Coordination Point
  A-21. A coordination point is a point that indicates a specific
  location for the coordination of tactical actions between
  adjacent units. It is used when a PL crosses a lateral boundary
  between two units or whenever a boundary crosses the forward
  edge of the battle area (FEBA). The difference between a contact
  point and a coordination point is that the establishing headquarters
  does not dictate the exact time when contact is required. Figure A-9
  depicts a coordination point. Figure A-9. Coordination point
  Forward Line of Own Troops
  A-22. The forward line of own troops is a line
  that indicates the most forward positions of
  friendly forces in any kind of military
  operation at a specific time. The forward line
  of own troops (FLOT) normally identifies the
  forward location of security forces. In the
  defense, it may be beyond, at, or short of the
  FEBA. It does not include small, long-range
  reconnaissance assets and similar stay-behind
  forces. Friendly forces forward of the FLOT
  may have a restrictive fire coordination
  measure, such as a restrictive fire area (RFA),
  placed around them to preclude friendly fire
  incidents. An enemy FLOT indicates the
  forward most position of enemy forces. Figure
  Figure A-10. Forward line of own troops
  A-10 depicts the symbol for the FLOT.