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Re: Cellphones in aircraft [was: Why this is broken; was Re: Extending a /64]

Simon Hobson <linux@thehobsons.co.uk> Tue, 17 November 2020 18:00 UTC

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Subject: Re: Cellphones in aircraft [was: Why this is broken; was Re: Extending a /64]
From: Simon Hobson <linux@thehobsons.co.uk>
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Date: Tue, 17 Nov 2020 18:00:53 +0000
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Tony Whyman <tony.whyman@mccallumwhyman.com> wrote:

> I believe that there are two problems that cause problems with cell phones and aircraft. One is that older aircraft can have poorly screened radios and headphones used for ATC voice comm (AM double side band in the VHF spectrum) with a risk that the cell phones can interfere with voice communication.

It's worse than that. "A bit of buzz" in the comms is obvious and as long as it's not too serious/prolonged can be worked around.
It's the rest of the systems - whether internal systems that control the aircraft, or the navigational radios (that indirectly control the aircraft) - that are more of a concern. If one of those is affected then it might not be obvious until it's too late - a system that wasn't designed with that sort of interference in mind might not be designed with the sort of error detection that goes with it.

Newer aircraft are generally designed with this sort of interference in mind - and I believe some carriers do now have small cells on-board with satellite comms as a backhaul.


Simon

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