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Given the great diversity of UAVs, there are varying numbers of UAV platforms and they can be classified broadly in terms of their sizes, design, usage, how high, and how long a UAV can fly. Nevertheless, the most basic categorization is determined by the weight of the drone. Here are some classifications done on various features.

Classification based on the weight of UA (Unmanned Aircraft) as follows [16]:

 • Micro: Less than two kilograms (<2 kg).

 • Mini: Greater than 2 kg and less than 20 kg.

 • Small: Greater than 20 kg and less than 150 kg.

 • Large: Greater than 150 kg.

Classification based on the aerial platform according to which there are four types of drones [7, 8]:

 1. Fixed-wing drones

 2. Multirotor drones

 3. Single-rotor helicopter

 4. Fixed-wing hybrid VTOL (Vertical Take-Off & Landing).