text: FM 7-100.1________________________________________________________________________________
  minefield breaching efforts and can cause confusion and delay in assembly
  areas. They can halt enemy attacks in areas not covered by an OD (or gain
  time for an OD to do its work). Maneuver forces use remote mining to protect
  their flanks or to attack targets deep in enemy territory or anywhere in the
  AOR. Remote minelaying can be useful against enemy columns, areas of con-
  centration, CPs, firing positions, and other targets. Such unpredictable mine-
  fields increasingly dominate OPFOR countermobility operations.
  10-42. Remotely-delivered (or scatterable) mines are laid without regard to
  classical patterns. They are designed to be delivered by aircraft, cannon
  artillery, multiple rocket launchers (MRLs), or ground vehicles, or they can
  be hand-thrown or emplaced by man-portable mine dispensers.
  10-43. Artillery. Some cannon artillery systems are capable of delivering
  both AP and AT mines. However, MRLs are the primary means of remote
  minelaying. The principal advantage of MRL mine delivery is its ability to
  quickly emplace large minefields in a single volley, while minimizing expo-
  sure to enemy targeting and weapon systems.
  10-44. Ground Vehicles. Within recent years, the trend has been to mount
  scatterable-mine dispensers on ground vehicles. Both AP and AT mines can
  be launched from ground vehicles. This also gives the engineers the ability to
  re-seed or reinforce an obstacle without entering the minefield itself.
  10-45. Infantry. OPFOR infantry units may employ man-portable remote
  mine dispensers. These man-portable dispensers, weighing only a few pounds,
  are ideal for installing small, defensive, AP or AT minefields. Infantry-fired
  ground dispensers allow units to remotely emplace minefields to protect their
  battle positions, flanks, and boundaries between units, or to cover firing lines
  and gaps in combat formations. They can quickly close breaches in existing
  protective minefields and increase the density of mines on armor avenues of
  approach.
  10-46. Aerial. Both AT and AP minefields can be laid using aerial minelay-
  ing systems. Bombers or ground-attack aircraft can lay remotely-delivered
  minefields throughout the AOR.
  10-47. Helicopter minelaying systems are used to emplace small or large
  minefields in the execution of offensive or defensive operations. This type of
  aerial minelaying is normally conducted over friendly territoryalong flanks
  or in support zones. When supporting an airborne or heliborne landing, heli-
  copters may lay mines on enemy-held territory. Helicopter mine chutes are a
  tool available to even low-technology helicopter forces for installation on a va-
  riety of helicopters by low-echelon maintenance units.
  OBSTACLE DETACHMENT
  10-48. The OD is the basic building block of the OPFOR’s countermobility
  effort. It is a task organization composed primarily of engineers. An OD can
  vary in size depending on the operational situation and the needs of the
  commander. An OSC may form several ODs based on its constituent or
  dedicated engineer units. An OD formed at this level is typically based on an
  engineer unit as large as a battalion. The OSC generally tries to create one
  OD for each ATR formed from its AT assets.