This document discusses drones and their uses. It defines drones as unmanned aerial vehicles (UAVs) that can be remotely controlled or fly autonomously. Drones are now used for a wide range of civilian purposes like search and rescue, surveillance, and traffic monitoring. The document outlines the objectives of exploring drone uses for transmission line inspection, maintenance, and mapping remote areas. It describes different types of drones including multi-rotor, fixed-wing, single-rotor helicopters, and hybrid VTOL drones. The components, applications, advantages, and implementation of drones are also summarized.