Here is mine:
Some fire brigades use un-maned air vehicles (UAVs) or microdrones at major incidents. This low-cost alternative to a manned helicopter can allow firefighters an unparalleled overview of the fireground. The vehicles can be fitted with video, thermal or stills cameras. They are remote controlled and can automatically hover using an in-built GPS receiver.
This is an example of a UAV. It has four rotors which run on electric motors. The battery lasts between 15 and 40 minutes depending on the wind, and only takes a few seconds to swap for a fresh one. When flying at 100 feet, the aircraft is silent and almost invisible.
It is used by the West Midlands Fire and Rescue Service.
