An Operational Ration (OPRAT) is a 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.