The unmanned aerial vehicle is not limited to military use, just like flying in general it is not used primarily for military use but the primary use of the skill of flying is that of convenience. To have access to the true three dimensional travel and observing is very much so a convenience, it enables one to view the world from the third dimension, from the bird eye view. It can be used to check on structures that are not easily accessible because of the height or other obstructions in the way.
It was also previously possible with the use of a hot air balloon, but it was more expensive and time consuming. Unlike hot air balloons, gliders, paraglide and real size planes and helicopters the U.A.V or a drone for the civilian use is more like a toy size, which is affordable to purchase and inexpensive to operate.
The joy of flying via a remotely controlled U.A.V is in most part in the modern invention of the digital technology in video and still photography. It is also in the real time visual monitor view from the flying U.A.V that makes it so much fun.
The applications are many, the range of products in drones and U.A.V's available is numerous, and there are toy size drones suitable for indoor use, other drones suitable for outdoor use.
The basic elements to consider is how high does the U.A.V need to fly, how long for, are there any factors that can be harmful to the U.A.V and potentially work against the joy of flying, e.g. wind, air currents, trees, power lines and bodies of water.
The wrong use of the U.A.V is becoming more of a concern for some people because of the potential disregard to personal privacy. There are the unwanted intrusions of privacy that has become more apparent with the new technologies available, criminal elements with fraudulent intensions to steal and rob others for material gain. But there are also other instruments that can be used for spying on others, if there is apparent need, or just being disillusioned; mobile phones, digital cameras, binoculars, tape recorders, phone numbers, and street address, all that spy stuff that can be seen on movies.
Unlike the above instruments drones are not silent, hidden microphones/cameras and phone taps are silent ears and eyes, but a domestic drone is relatively loud when it is flying. It could potentially fly into someone's back yard during a busy traffic or absence of the occupants and land on a tree and view what is happening on someone's back yard, also listen with an audio microphone, and depart 24 hours later, or at some other convenient time. But it sound very much a twisted banal preoccupation, but has been and still are people selling specialized “spy on other people” gadgets, for some people to alleviate their paranoia.
The military U.A.V has much more stealth and far more distance between the platform and the target; they are multimillion dollar platforms that entirely at a different scale to the UAV and drones that are available for a few hundred dollars. The U.A.V for a domestic use is a relatively loud flying object; it can have 3,4,6,8 rotors, with as many electrical motors that increase in volume.
You won't sneak up on anyone while the engines are running, gliding past on a single wing could be stealth without anybody taking any notice, if they are face down on a beach or if their eyes are closed. There are many good reasons as to why buy a toy drone or a U.A.V, here are some of them: fly indoors, dust the top of cupboards, fly and view the world from the sky, view the local environment from above, take images and video footage from the sky, check the roof for any damage, a new hobby, learn the new skill of remotely flying a U.A.V, and possibly many other environmental and regional reasons.
Depending on the personal interest and need, indoors, outdoors and the entry level for this new hobby, and whether kids will use it un-supervised by an adult, there are several levels to choose from; a toy drone, a serious toy, or an U.A.V.
Which every entry level is chosen it is a new challenge to master, flying via a remote control can be a great discipline, coordination for the cognitive mind and for a sharp eye, yet another reason as to why buy U.A.V.