ATP-4-90 Brigade Support Battalion Download
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Appendix C C-8 ATP 4-90 18 June 2020 C-24. The required supply rate indicates how much ammunition is needed for an operation and is an expression of operational requirements from supported units. It is a communication of warfighting requirements, not logistics capabilities. To sustain tactical operations for specific periods, units determine their munitions requirements and submit a required supply rate. The required supply rate is the amount of ammunition that a maneuver commander estimates will be needed to sustain tactical operations without ammunition expenditure restrictions over a specified time. The required supply rate is expressed as rounds per weapon (on-hand) per day, a bulk allotment per day, or per unit mission. Units route the required supply rate computations and through unit operations sections, and unit S-4 sections help in the process. C-25. Maneuver commanders develop required supply rates and submit them to their next higher headquarters. Each level reviews, adjusts, and consolidates required supply rate information. The Army Service component commander determines the controlled supply rate by comparing the total unrestricted ammunition requirements to the total ammunition assets on hand or due in. Several factors limit the amount of ammunition available for an operation including: mission objectives, priorities, the projected threat, and ammunition availability. Army Service component commander establishes the controlled supply rate, which is based on the amount of munitions available for issue. When a munitions item is in short supply, the controlled supply rate is low. The commander determines who receives the ammunition. A controlled supply rate is expressed when the requirements (required supply rate) exceed the capability of the logistics system. The controlled supply rate is driven by logistics constraints, but it is still an operational consideration. C-26. Properly calculating and adhering to stockage objectives enables freedom of action, reduces the hazards of stockpiling and economizes limited resources. When determining a stockage objective, units must also take logistics factors (such as storage space and transportation capabilities) into account. For more information on ammunition planning factors, see ATP 4-35. TRANSPORTATION PLANNING FACTORS C-27. Typically, a BSB can easily execute two LOGPAC convoys per day through planned resupply operations. However, the BSB can add additional emergency LOGPAC convoys based on mission variables as needed. The following planning factors are used in transportation planning to compute vehicle and truck requirements. Operational and mission variables may affect these factors, and sustainment planners must take these variables into consideration. Fires brigade BSBs can expect to execute only one LOGPAC operation per day and maintain security. LINE HAUL AND LOCAL HAUL OPERATIONS C-28. The current capability of the Army’s family of medium tactical vehicles, heavy expandable mobility tactical truck series (such as the LHS and PLS versions, M915 tractor trucks) are capable of both local and line haul operations. These systems can execute longer missions than are currently performed by sustainment units utilizing these systems. C-29. The distance of a line haul leg is based on a 10-hour shift per driver and 1 hour of delay. Using this planning factor, each driver can complete one round trip per shift. This eliminates the need for billeting drivers away from their assigned unit, provides rested drivers for each trip, and allows for vehicle maintenance. C-30. The planning factors for line haul operations are— Two trips per day (one trip per shift). Approximately 144 kilometers (or 90 miles) each way per shift. C-31. The planning factors for local haul operations are— Four trips per day (two trips per shift). Approximately 34 kilometers (or 20 miles) each way per shift. C-32. The planning factors for the average speed for both local haul and line haul transportation operations are— 32 kilometers per hour (or 20 miles per hour) over good road conditions. 16 kilometers per hour (or 10 miles per hour) over poor road conditions.