text: Sustainment
  above or below ground. An above ground cache is easier to get to but is more likely for the enemy, civilians,
  or animals to discover. A security risk always exists when returning to a cache. A cache site is observed for
  signs of enemy presence and secured before unit’s use it due to the potential of booby traps and enemy
  observation.
  Aerial Delivery
  9-99. Aerial delivery is a vital link in the distribution system and provides the capability of supplying the
  force even when enemy or other elements have disrupted the ground lines of communications or terrain is
  too hostile, thus adding flexibility to the distribution system. When applied together with surface distribution
  operations, aerial delivery enables maneuver forces to engage in a battle rhythm that is not as restricted by
  geography, supply routes, tactical situations, or operational pauses for logistic support. In order for effective
  aerial delivery, friendly forces must control the airspace in the area of operations and must neutralize enemy
  ground-based air defenses (see FM 3-99).
  9-100. Aerial delivery includes airland, airdrop,and sling-load operations and can support units in various
  operational environments where terrain limits access. The BCT can use aerial delivery for both planned and
  emergency resupply of sustainment. Aerial delivery acts as a combat multiplier because it is an effective
  means of by-passing enemy activity and reduces the need for route clearance of ground lines of
  communications. (See ATP 4-48 for additional information.)
  9-101. BCT units must be prepared to receive airland, airdrop, and sling-load resupplies. (See ATP 3-21.20
  for a detailed discussion of aerial delivery means.) The receiving commander must consider the enemy’s
  ability to locate friendly units by observing the aircraft. The receiving unit should establish the drop zone and
  landing zone away fromthe main unit and in an area that they can defend for a short time unless the resupply
  is conducted in an area under friendly control and away from direct enemy observation. The delivered
  supplies are immediately transported away from the drop zone and landing zone. Units must know how to
  select pickup zones and landing zones, how to receive aerial delivery of supplies and equipment, and have
  the ability to return any reusable rigging material to the owning or supporting unit. (See FM 3-21.38 for
  additional information.)
  Refuel on the Move
  9-102. Refuel on the move (known as ROM) can be tailored to many tactical situations but the primary
  purpose is to extend reach and tempo for the offensive operation. Any level unit, to meet mission
  requirements, can conduct ROM operations. Typically, an FSC will conduct ROM operations to support
  maneuver units between engagements or to increase time on target while maneuver units peel back and flow
  through the ROM and return to the current engagement. A ROM can be as simple as utilizing heavy expanded
  mobile tactical trucks or modular fuel systems, or as complex as needed utilizing any equipment available to
  support the largest of movements.
  9-103. When vehicles enter a ROM site for refueling, fuel trucks issue a predetermined amount of fuel
  (usually timed) and the vehicles move out to return to their convoy or formation. The rapid employment of
  the ROM distinguishes it from routine convoy refueling operations. Planners do not intend a ROM to
  completely refuel a combat vehicle. Instead,they intend a ROM to rapidly resupply a set portion of fuel to
  extend the operational reach of ground maneuver forces.
  9-104. Supported unit S-3 and S-4 staffs coordinate with the BCT S-4 and BSB support operations officer
  to set the time and place to conduct the ROM operations according to unit battle rhythm and establish how
  much fuel or time for fueling the BSB or FSC will give each vehicle. The concept can be extended based on
  the size and scope of the operation, for example, the DSSB can be the force conducting the ROM for the
  whole division, while the entirety of the BCT’s fuel assets push through remaining topped off. In the BCT
  concept of operations, ideally the distribution company conducts the ROM, while the FSCs pass through
  maintaining full mobile storage capacity. (ATP 4-43 contains information about ROM operations. ATP 4-90
  depicts an example of a ROM layout.)