$50 radio 5km out to sea?!!

Video Channel
Please help us to find bad videos. Broken or unappropriated video content?
Yes, but not really practical past 4km.
Gear used:
FS-i6X radio (Banggood):
Telemetry radios (Banggood):
VTX antenna (Banggood):
VTX (Banggood):
GPS module (Banggood):
Helical antenna (Banggood): (ymmv...)
FPV monitor (Banggood):
LiPo battery (HobbyKing):
Mini-talon plane (Banggood):
The 900MHz antenna on the ground station is one that I got with the u-blox RTK development set, I don't know where you can buy them.
The 900MHz antenna on the plane is this, but seems to be discontinued (HobbyKing):
Fpvracer.lt is not the owner of this text/video/image/photo content, the real source of content is Youtube.com and user declared in this page publication as Youtube.com user, if you have any question about video removal, what was shared by open community, please contact Youtube.com directly or report bad/not working video links directly to video owner on Youtube.com. Removed video from Youtube.com will also be removed from here.