Post AhpO5G7jUrWrYQrQJ6 by dl2jml@mastodon.radio
(DIR) More posts by dl2jml@mastodon.radio
(DIR) Post #AhpO55fiMBAv8dfuFM by abraxas3d@mastodon.radio
2024-03-12T13:20:45Z
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Last week's @RATPAC #emcomm panel had several memorable quotes that I really hope we follow up on. The one about professional emergency services people avoiding #hamradio people and actively discouraging incorporation of hams into plans was hard to hear. There was a strong consensus that the way forward was "more training" and "appear professional". A quote was "don't show up (to volunteer) dressed like you live under a bridge".
(DIR) Post #AhpO56J3zseP6g5Ka0 by alper@mas.to
2024-05-04T21:34:23Z
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@abraxas3d @RATPAC I got my ideas together about this and wrote the following post. It was waay over due and I am glad that I have these in words now (=https://alperatmaca.com.tr/posts/emcomm/
(DIR) Post #AhpO57RFmunQcMvNz6 by dl2jml@mastodon.radio
2024-05-05T19:28:48Z
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@RATPAC @abraxas3d @alper I know little about emergency communications, but I am always puzzled to see this addressed as a single problem. To me, it looks as a bunch of different problems with very different technical solutions and therefore the skills are very different. I'll gave a few examples to show how I see it.
(DIR) Post #AhpO58XJhrEy1Slk4e by abraxas3d@mastodon.radio
2024-03-12T13:26:46Z
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@RATPAC this didn't paint a great picture, but is this "hams have a problem with professionalism" really that common, or is this a bit of turf war mindset from some of the paid emergency services and public safety ranks?Mixing paid staff and volunteers is always tricky.
(DIR) Post #AhpO58bZS2dwEel8hk by dl2jml@mastodon.radio
2024-05-05T19:31:53Z
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@abraxas3d @alper @RATPAC First: search and rescue operation. This simply needs a bunch of people with VHF handhelds and maybe a dispatch station or an ad-hock relay. There is no extreme time constraint, you can get equipment on vehicles, only relay and local communications are needed.
(DIR) Post #AhpO5BN9A7t6on2A8e by dl2jml@mastodon.radio
2024-05-05T19:35:27Z
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@abraxas3d @alper @RATPAC Second: major disaster as what happened in Puerto Rico some time ago: relays and towers down, roads damaged, need for long-distance communication. That is the time for the HF guys, if they still can get their antenna high enough. There is also limited need for local communications.
(DIR) Post #AhpO5DfecHsdwlhyGO by dl2jml@mastodon.radio
2024-05-05T19:41:18Z
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@RATPAC @abraxas3d @alper Third: local disaster in a developed country, e.g. high rains in the Eifel in Germany: roads and power are cut. Network operators, which run cellular systems, can't ship generators around (roads are cut). Only local communications are needed, but for the general population (and not just a few licensed amateurs). This would have been helped by a local lora / meshtastic net (which could run a few days on solar), less so by amateurs.
(DIR) Post #AhpO5G7jUrWrYQrQJ6 by dl2jml@mastodon.radio
2024-05-05T19:48:33Z
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@alper @RATPAC @abraxas3d That last example also introduces technology (lora / meshtastic). Amateurs seem -to met- still living in the 80s with analog technology and voice communications. But the world has moved forward, off the shelf devices allow ad-hock relays, text messages and routing to the end user without a trained operator.
(DIR) Post #AhqtkyxazZ3qDqSDVA by dj3ei@mastodon.radio
2024-05-06T07:39:30Z
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So if the German IARU member #DARC had published a list on what they would like to provide in a local emergency situation, with "internet access" at the top of that list, you would be happy to read that? https://www.darc.de/der-club/referate/notfunk/notfunk/nationaler-notfunk/szenarien-und-aufgaben/@dl2jml @alper @RATPAC @abraxas3d
(DIR) Post #AhqtkzrbdJrd1Yewnw by dl2jml@mastodon.radio
2024-05-06T09:14:18Z
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@abraxas3d @RATPAC @alper @dj3ei That is not one the best publications from the DARC, I am afraid. While hamnet is a thing in Germany (and I am really impressed by the network), one cannot really access the whole Internet with it, as it routinely requests encryption (https).Maybe they just mean "talk with someone outside of the black-out zone with Internet access and ask them to fill the emergency online forms", but even that seems silly.
(DIR) Post #Ahqtl1L49H1VbDRzMW by alper@mas.to
2024-05-06T09:48:01Z
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@dl2jml @abraxas3d @RATPAC @dj3ei There is different layers to comm needs on ground zero. Regardless of what future tech provides in terms of mod, single channel instant voice will always be needed. Right now repeaters and handheld uhf/vhf radios fill that role regardless whatever is there. This only may change if wide area SHF systems made more relieable and cheap. For HQ to outside connections internet is desirable since high flexibility and support for regular systems.
(DIR) Post #Ahqtl2A75TrA9XKkvg by alper@mas.to
2024-05-06T09:53:04Z
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@dl2jml @abraxas3d @RATPAC @dj3ei The needs of the population in affected area is wildly different than responders. This is what gets mixed mostly. To provide unorganized, panicked people meaningful bandwidth is near impossible today. LoRa shares same sliver of frequency with cascading relay topology which is easy to overwhelm in relatively mid loads. Cities invest a lot in wifi based networks in streets but nobody makes them reliable enough to provide intranet in case.
(DIR) Post #Ahqtl38jS6LVBXhAPo by dl2jml@mastodon.radio
2024-05-06T13:16:24Z
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@RATPAC @alper @dj3ei @abraxas3d Providing large bandwidth to everybody in emergency situations is impossible today and will be impossible in the future as dictated by physics. Bandwidth needs SNR, which means power. In emergency situations, power is limited or there would not be an emergency.We can offer SMS type messages to everyone on solar and batteries, Lora does that today. We could mandate the implementation of similar systems in cellphones networks, yes.
(DIR) Post #Ahqtl48PklgaGqYQYi by dl2jml@mastodon.radio
2024-05-06T13:18:14Z
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@abraxas3d @dj3ei @alper @RATPAC But we can't and we won't be able to offer LTE download speeds in emergencies to everyone, this is never going to happen.
(DIR) Post #Ahqtl4zEaNw8ufGbtA by alper@mas.to
2024-05-06T09:59:22Z
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@dl2jml @abraxas3d @RATPAC @dj3ei This is the reason govs here and around the world press for robust LTE towers with power backup that can be linked outside of a certain distance without any cable and such. With 3g downgraded speeds this serves a large population with basic sms service. Gradually getting capacity back makes things better.This is what actually happened in east Turkey last year. The problem was affected area was larger than anticipated. Mobile relays made things better in days.