Final answer:
Sergeants relieve patrol units during emergencies or as needed, rather than at specific times such as the end or mid-shift.
Step-by-step explanation:
Sergeants and Patrol Units
When it comes to relieving patrol units, sergeants usually do so during emergencies or as needed, rather than at specific times such as the end or mid-shift. The role of a sergeant is to supervise and manage the patrol units, ensuring that they are properly deployed to handle emergencies and other situations as they arise.
For example, if there is a large-scale protest or riot happening in the area, the sergeant may need to call in additional patrol units or rotate existing units to ensure adequate coverage and crowd control. Similarly, if a patrol unit is involved in a critical incident or needs to take a break, the sergeant may reassign or relieve them to allow for rest and recovery.
- During emergencies
- As needed