An Operational Ration (OPRAT)  is standard pack, individual or group ration purchased by Defense Logistics Agency (DLA) Troop Support for the purpose of feeding military troops during training or in an operational environment [as opposed to Humanitarian Daily Rations (HDRs) which are intended to feed large populations of displaced persons.] DLA Troop Support maintains specific requirements for what is included in each ration type and for how each ration is to be inspected for deterioration over time or in extreme temperatures. Operational Rations include, but are not limited to, Unitized Group Rations (UGRs); Meals, Ready-to-Eat (MREs); Kosher/Halal Meals; and Survival Rations.

Questions regarding Operational Rations may be directed to U.S. Army Public Health Command, Operational Rations at 410-417-3098, Aberdeen Proving Ground, Maryland or USAPHC, Army Institute of Public Health (AIPH), Food Protection Program, Aberdeen Proving Ground.