text: Tactical Control Measures
  artillery units when processing fire missions. A commander uses an assault time instead of a time of attack
  because of differences in distance, tactical mobility, and known obstacles among subordinate units. (See
  paragraph A-59 for more information on a time of attack).
  Attack by Fire Position
  A-46. An attack by fire position designates the general
  position from which a unit performs the tactical task of attack
  by fire (ADP 3-90). The purpose of these positions is to mass
  the effects of direct fire systems for one or multiple locations
  toward enemy forces. Attack by fire positions rarely apply to
  units larger than a company. An attack by fire position does
  not indicate the specific site. Figure A-26 depicts ATTACK
  BY FIRE POSITION BRANDON. (See paragraph B-3 for
  more information on the tactical mission task of attack by
  fire).
  Figure A-26. Attack by fire
  position JAMES
  Attack Position
  A-47. The attack position is the last position an attacking force occupies or passes through before crossing
  the line of departure (ADP 3-90). An attack position facilitates an attacking force’s deployment and last-
  minute coordination before it crosses the LD. Located on the friendly side of the LD, an attack position offers
  cover and concealment for the attacking force. Commanders use it primarily at battalion level and below.
  Whenever possible, units move through the attack position without stopping. An attacking unit occupies an
  attack position for various reasons, including when the unit is waiting for specific results from preparation
  fires or when it is necessary to conduct additional coordination, such as a forward passage of lines. If the
  attacking unit occupies the attack position, it stays there for the shortest amount of time possible to avoid
  offering enemy forces a lucrative target. Figure A-25 on page A-14 depicts ATTACK POSITIONS BLUE
  and GOLD.
  Axis of Advance
  A-48. An axis of advance designates the general area through which the bulk of a unit’s combat power must
  move (ADP 3-90). A commander uses an axis of advance for three primary reasons:
  * To direct the bypass of locations that could delay the progress of the advancing force, such as
  known contaminated areas.
  * To indicate that the force is not required to clear the entire assigned area as it advances. The force
  will be required to clear the axis based on specified bypass criteria.
  * To indicate to a unit involved in offensive encirclement, exploitation, or pursuit operations the
  need to move rapidly toward an objective.
  A-49. An axis of advance can be used by any maneuver echelon. Subordinate maneuver units can develop
  their own axis of advance within the confines of their higher headquarters axis of advance. For example, a
  battalion can establish multiple company level axis of advance as long as each company’s axis of advance
  remains within the bounds of the battalion’s axis of advance. The width of the axis varies based on factors
  such as terrain, size and type of friendly forces, and time. Generally, a wider axis of advance is used in
  unrestricted terrain. When using an axis of advance, the risk is that friendly forces do not detect enemy forces
  outside the axis and the enemy is inadvertently bypassed. Figure A-25 on page A-14 depicts AXIS OF
  ADVANCE JAN. When developing the axis of advance, commanders also establish bypass criteria (see
  paragraph 12-27 for bypass criteria).
  Battle Handover Line
  A-50. The battle handover line is a designated phase line where responsibility transitions from the stationary
  force to the moving force and vice versa (ADP 3-90). The common higher echelon commander of the two
  forces establishes the battle handover line (BHL) after consulting both commanders. The stationary
  commander determines the location of the line. The BHL is forward of the FEBA in the defense or the FLOT