'A' rations today may include the Unitized Group Ration A (UGR-A), a hybrid meal kit designed to feed a group of 50 persons for one meal.The UGR-A has several different varieties, including a tray-based heat and serve (T-rat) form, heated by hot water immersion when a field kitchen is not available, or the express form, with a self-heating module and disposable accessories.