5-80. There are three techniques for conducting a relief: sequentially, simultaneously, or staggered. A sequential relief occurs when each element within the relieved unit is relieved in succession, from right to left or left to right, depending on how the unit is deployed. A simultaneous relief occurs when all elements are relieved at the same time. A staggered relief occurs when a commander relieves each element in a sequence determined by the tactical situation, not its geographic orientation. Simultaneous relief takes the least time to execute, but is more easily detected by the enemy. Sequential or staggered reliefs can take place over a significant amount of time. These three relief techniques can occur regardless of the mission and operational environment (OE) in which the unit is participating.