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We walk along the shoreline as far as possible and try to get different angles on our shot, also we need to find obstacles. Yes obstacles, especially in a harbor environment there are quite a few lines, steel cables and other interesting stuff being a potential hazard to a flying copter but many times they are only visible from different angles. So we take this walkaround very seriously.We try to find points we can use for our own orientation while flying over water.Most of the times there is sand close to water so we always bring an extra landing padWe use the RF Explorer for scanning the band. If the RC band is to crowded we switch to manual frequency mode or postpone the flight. For us this part is really important because the Phantom 3, the Inspire and the stand alone Dji Lightbridge components work in a really interesting way.When you fly your Phantom 3, the RC connection and the video feed is sent via 2,4 Ghz. How that works in the background is as follows. Both feeds are different signal packages so the RC signal is one package and the video signal is a second package. Whereas the RC signal uses the whole bandwidth of approximately 90 Mhz, the video signal only uses 8 channels in a bandwidth of 10 Mhz within the full bandwidth. It also has a lower priority, so it can happen, that you lose the video feed but you still have full RC control over the Phantom. But other than RC systems from otherAlloverWater manufacturers, the Dji RC signal stays on a given channel as long as this channel doesn´t get overloaded. As soon as this happens, it hops on over to the next channel. So the Lightbridge system is not a constantly hopping system.Therefore we need to make sure, that the 2,4 Ghz band is not to crowded when we need to fly over open water. If only part of the band is crowded we switch over to manual frequency selection, that way we make sure that the RC connection stays clean. When we do that, obviously someone checks the band during the whole flight via the RF Explorer to see whether something changes. If it does we rather come back and land than keep on flying on a crowded band using just a single channel.
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