The drone also nevertheless has GPS and downward vision sensors for landing, so auto return to home and various 'conventional' functions can be obtained, as well as older 'O2' radio procedure is rated for 6.2 miles/10km – so still correctly adequate when flying legally. Using its IPS (Indoor Positioning Procedure) https://gregoryuiwen.bloggerswise.com/34657396/detailed-notes-on-uses-of-drones-in-construction