text: Mobility
  Advance from the far side The attack to secure the exit bank and intermediate objectives that
  eliminates direct and observed indirect fires into the crossing area.
  Secure the bridgehead line The tasks necessary to secure bridgehead objectives, defeating any
  enemy counterattacks. This gains the necessary time and space for the
  buildup of forces for the attack out of the bridgehead.
  Continue the attack The attack out of the bridgehead to defeat the enemy at a subsequent or
  final objective. It is considered as a phase of the gap crossing because
  the timing and initiation of this phase are typically dependent on the
  success of the other four phases of the gap crossing.
  CLEAR
  18-73. Clear is both a tactical mobility task and a mobility task. The mobility task involves the total
  elimination of an obstacle that is usually performed by follow-on engineers and explosive ordnance disposal
  units. It is not normally performed under the threat of direct or indirect fire. Clearing is conducted to eliminate
  tactical and protective obstacles affecting the operational area. Units may order clearing to facilitate
  movement within an assigned area based on the mission variables. They may also order a critical route or
  area cleared of obstacles. The task is conducted as a single mission to open or reopen routes not under
  persistent surveillance or it may be conducted on a recurring basis in support of movement along routes here
  a sustained threat exists along critical routes. (See ATP 3-90.4/MCTP 3-34A for more information on
  clearing.)