The objective of reducing crime rates effectively can be achieved by increasing the number of patrols and expanding the area under patrolling. But increasing the number of patrols, in turn, increases the costs associated with resources and logistics exponentially as more manpower and equipment are required. It should also be understood that increasing the number of patrols is not always a viable option as the local administration may have a shortage of manpower or equipment or both.
Further, increasing the duty hours of police officials might elevate their stress levels leading to a decrease in the effectiveness of beat patrolling. Traffic jams, roadblocks due to repair works and limited field-of-view of the CCTV networks may also prevent marshals from responding immediately to any emergency. Manned patrols are more visible and predictable as well.
Drones can help in chasing the suspects and controlling crimes. When a suspect takes to the roof or unmanned area, it can be difficult for the ground units to know where he or she is. Having an eye in the sky provides critical intelligence and guides the ground units to optimal positions. Reducing uncertainty also helps to reduce the stress levels of patrolling teams.