text: Tactical Control Measures
  Figure A-23. Routes
  Start Point
  A-41. The start point is a designated place on a route where elements fall under the control of a
  designated march commander. All routes have a designated SP and RP that are easily recognizable on the
  map and on the ground, such as a road junction. It is far enough from the assembly area to allow units to
  organize and move at the prescribed speed and interval when they reach the SP. Figure A-23 depicts SP 7 on
  ROUTE IRON.
  Target Area of Interest
  A-42. A target area of interest is the geographical area
  where high-value targets can be acquired and engaged
  by friendly forces (JP 2-0). Commanders use TAIs to
  apply a specific effect against a specific target with a
  defined outcome. The difference between a TAI and an
  NAI is that an NAI is established to obtain information
  and answer a specific information requirement whereas
  a TAI is established to create a pre-determined effect.
  The unit staff develops TAIs during the MDMP, based
  on the currently available products resulting from the
  IPB. These TAIs are further refined during course of
  action analysis and finally approved by the commander
  during course of action approval. The shape of a TAI
  reflects the target and effect intended for the TAI.
  Information collection assets normally cue their use.
  Commanders designate TAIs for any organic or Figure A-24. Target area of interest
  supporting systems. TAIs differ from engagement WHITETAIL
  areas. Engagement areas plan for the use of all
  available weapons, while TAIs might be engaged by a single weapon or system. Figure A-24 depicts TAI
  WHITETAIL.