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Improve the VHF coverage for air/ground communications with aircraft.

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Improve the VHF coverage for air/ground communications with aircraft.

Old 9th Oct 2014, 02:57
  #1 (permalink)  
Thread Starter
Join Date: Oct 2014
Location: Morocco
Posts: 2
Improve the VHF coverage for air/ground communications with aircraft.

Hope I've chosen the right forum for my question.
I'm an Atsep trainee, And i would love to ask experts here about the ways to improve the VHF coverage over the oceanic part of the FIR ..
As you may know, VHF is "straight line" transmission and is therefore limited in range by the horizon. That is not a problem for as now for most populated parts of the FIR, but for operations in some oceanic airspace, you might be out of range of VHF stations.
For now, we succeeded covering 90% of the Oceanic part of our FIR for flight levels above FL300, where we have had less coverage by implementing new VHF stations and updating old ones (make antenna directional, increase power, up to 200w ...)
But we still have problems for FL under FL300, because of VHF straight line transmission and curvature of the earth.
What do you suggest as a solution to ensure the VHF coverage for under FL300, and also if there are any other solutions for above FL300.

Hope I explained the problem well.

Thanks and Kind regards,
guettafor is offline  
Old 9th Oct 2014, 23:48
  #2 (permalink)  
Join Date: Mar 2014
Location: Way north
Age: 43
Posts: 348
Working in the northern hemisphere of the Atlantic region, if you're unable to place VHF trancievers to cover the area, I guess HF is the old, trusted, and partly reliable solution.

I worked HF for a decade, and really love that old piece of a communication system.

Problem was the amount of traffic making the frequencies overloaded, hence the many HF families over the NAT region, and the implementation of datalink.
jmmoric is offline  
Old 10th Oct 2014, 08:59
  #3 (permalink)  
Join Date: May 2013
Location: Earth
Posts: 113
Perhaps a VHF relay station located in Madeira or the Canary Islands would help.
EastofKoksy is offline  
Old 13th Oct 2014, 11:09
  #4 (permalink)  
Join Date: Feb 2010
Location: SE
Age: 26
Posts: 30
Datalink *cough*
hammerthrower is offline  
Old 13th Oct 2014, 11:55
  #5 (permalink)  
Join Date: Nov 2013
Location: Inacave
Posts: 71
Ham Radio nut here, not ATC. Satellites are the obvious answer, but Hams use "Repeaters" (hears on one freq, simultaneously rebroadcasts it on another where all listen) which could be done with a few ships along the routes. Cheap and low-tech but relaible and easily workable.
SawMan is offline  
Old 14th Oct 2014, 18:43
  #6 (permalink)  
Join Date: Oct 2002
Location: ireland
Posts: 216
For anything beyond line of sight on the ocean you have really 2 options.
  1. HF
  2. Satellite Data-Link.
confused atco is offline  

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