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  1. Soad70

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    Hi, I have been trying/experimenting with low flying over water and found it hard/impossible to keep control of the AC. I have been playing with litchi and tried turning off the VPS and I must say I am very happy with the outcome. It might be giving me a false sense of security but it's some where to start..... Anyone else played/experimented with low flying over water and have tips/info they can pass on would be great.



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  2. bbfpv

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    most definitely keep VPS disabled.
     
  3. BA577

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    How low are you flying over water?
     
  4. maseman88

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    I don't get this post... i fly over water all the time. With all the sensors activated... no issue for me.
     
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  5. Soad70

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    I don't have a particular height I want to fly at, just want to feel comfortable flying low if/when I need to. I have a lot of water around me and would like to explore. In the video the bird was about 1 metre above the water.


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  6. Soad70

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    How low are you flying? What type of bird do you use?


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  7. BA577

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    Location:
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    I have been flying at 30' above the ocean without any issues. I have a Phantom 4 with all sensors activated. I am not inclined to fly much lower than that over the ocean due to wave hight variations.
     
  8. Wibble

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    Just remember you get lots of real birds on the water. They can take off suddenly. I fly high over water for this reason only.
     
  9. erikgraham

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    What issues are caused by VPS over water?
     
  10. Tarzan!

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    The manual states that the VPS cannot function properly over surfaces that do not have pattern variations and later states may not function properly by flying over water. I think it has something to do with water's reflective properties and the transparency of it. In other words, it can't accurately detect it's altitude over water.
     
  11. erikgraham

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    Yeah. I've seen that. I was trying to get more at what bahvior people are actually seeing when they fly low over water. Do you get an in-app warning? Does the P4 gain or lose altitude suddenly? What happens?
     
    #11 erikgraham, Jul 27, 2016
    Last edited: Jul 27, 2016
  12. Tarzan!

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    I'm not sure, because I haven't tried it. However, since the VPS is used to hold a solid location, I'd assume it might just have the tendency to wander a little bit since it would then just be relying totally on GPS.
     
  13. Soad70

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    It will wander sideways or jump around (decrease/increase altitude), turning off VPS stopped all that and gives me a little more confidence when flying low over water.


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  14. Soad70

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    Flying 10 meters (30') is not an issue its when I try to go lower than say 3 meters I have issues that's why I'm experimenting with the VPS off option in litchi. I want to feel confident in the bird so I can go lower and get some good video.


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  15. Patrick

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    the issues ive seen has been a drift over wavy or running water . still water i havent had issues. but if its moving the phantom seems to lock on to the pattern and try to follow the wave....
     
  16. erikgraham

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    Makes sense. 10 meters is beyond the range of the VPS sensors... so your on the barometer anyway.
     
  17. erikgraham

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    So can't we disable VPS in the Go App? Only in Litchi?
     
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  18. Tarzan!

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    Awesome shots!!! Just be careful. Rangers can be funny about what is considered "harassing" wildlife. I fly paramotors, classified by the FAA as an unltralight, and a couple years ago a fellow pilot got whacked with a big fine for flying over a few whales. He was between 200 and 230 feet above the water, but it was too close in the eye's of the ranger.
     
  19. Patrick

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    a little off topic , i wonder if the sonar bothers the whales
     
  20. Toyz

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    This is a topic of interest to me also. I have been using my phantom 4 for knee board and wake boarding video. Makes me nervous flying 15' off the water. I somehow pressed the left stick down instead of the right and almost put it into the drink. I am going to neuter the altitude stick (why do I need to go up or down that fast).
     
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