Aerial inspections are safe, fast and less expensive than traditional methods that involve climbers, ladders or cherry-pickers.  Set up time and labor are significantly reduced.  They can avoid environmental issues such as high voltage, toxins, pollution and radiation.  There are many situations where aerial inspections can reach areas almost impossible to reach by other means.  Drones can also be programmed to do inspections autonomously.  While this can take some effort, it means that future inspections can be conducted accurately and quickly.  Since pictures are taken from the same locations, it is easy to compare results with previous images.