A drone could have a superb camera but no gimbal. Gimbals are important pieces of stabilizing machines that steady cameras throughout operation. Registration is a compulsory need for commercial drone operators. Check out dronezone.faa.gov and choose “Fly sUAS beneath Part 107” to generate an account and register your drone. http://industrial-drone-inspecti75295.isblog.net/the-2-minute-rule-for-search-and-rescue-drones-11956431