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04-12-2016, 07:28
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#31
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Registered User
Join Date: Nov 2011
Location: Portugal/Med
Boat: Comet 41s
Posts: 6,140
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Re: Internet-Independent Weather
I understood badly what you mean by internet-independent weather. I assumed you were talking about providers that use information provided by different weather analysts and present several models independently from the ones that provide the information.
All the other ways provide a less informative weather report and today with a satellite telephone you can have information from the internet.
I have a Navtex but the value of the information presented there is much smaller than the one you can get by internet and about the same you can receive by short wave radio. It is very important to receive images of the weather systems, preferably already worked, to understand how the weather is going to evolve and to be able to take decisions regarding what to do and where to go.
Even the very small racing boats that do transat like the Figaro class (33ft), receive weather information by internet through satellite phone (outside routing is forbidden).
A very curious kit about the Figaro class and the Transat for the kids on the French schools to get educated about solo races. No wonder that solo racing is popular in France On page 24 they talk about satellite telephone and receiving weather information.
http://www.transat-bretagnemartiniqu...ecole_2013.pdf
If someone don't need them all the time, but just to some ocasional long passages, they can be rented.
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04-12-2016, 07:45
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#32
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cruiser
Join Date: Nov 2007
Location: Probably in an anchorage or a boatyard..
Boat: Ebbtide 33' steel cutter
Posts: 5,030
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Re: Internet-Independent Weather
Quote:
Originally Posted by Polux
I have a Navtex but the value of the information presented there is much smaller than the one you can get by internet and about the same you can receive by short wave radio. It is very important to receive images of the weather systems, preferably already worked, to understand how the weather is going to evolve and to be able to take decisions regarding what to do and where to go.
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Short wave radio will give you exactly the images you described via weather fax, even a mobile phone sat next to the reciever can decode the broadcasts these days. Though a bigger screen would be better...
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04-12-2016, 09:12
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#33
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Moderator
Join Date: Mar 2009
Location: Denmark (Winter), Helsinki (Summer); Cruising the Baltic Sea this year!
Boat: Cutter-Rigged Moody 54
Posts: 33,764
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Re: Internet-Independent Weather
Quote:
Originally Posted by Polux
. . . It is very important to receive images of the weather systems, preferably already worked, to understand how the weather is going to evolve and to be able to take decisions regarding what to do and where to go.. . .
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Exactly. This is the key point.
Next year I will change my weather routine and start getting weatherfaxes via HF radio, and grib charts and forecasts via Getfile and Pactor. Just to get into the habit of it. Instead of relying on grib files via mobile networks as I have always done.
I have a fixed installed sat phone on my boat (installed by the PO), but I have never activated it and don't plan to. I prefer to work by HF radio.
I will acquire a DeLorme satellite device, because of the superb utility of unlimited short messages, but that won't help me with weather for the reasons you stated.
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04-12-2016, 09:43
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#35
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Registered User
Join Date: Apr 2007
Location: Australia
Boat: Island Packet 40
Posts: 6,432
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Re: Internet-Independent Weather
Quote:
Originally Posted by conachair
Short wave radio will give you exactly the images you described via weather fax, even a mobile phone sat next to the reciever can decode the broadcasts these days. Though a bigger screen would be better...
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Interesting, what software does the phone use?
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04-12-2016, 10:35
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#37
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Registered User
Join Date: Aug 2009
Location: between the devil and the deep blue sea
Boat: a sailing boat
Posts: 20,420
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Re: Internet-Independent Weather
Quote:
Originally Posted by conachair
There are actually world wide grib data being beamed down now, but no one has had a good go at getting a stable antenna on a moving boat yet.
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What about an antenna with lower dbi and a broader reception angle? (gps-style antena ?) Something that could work from a relative stable boat (say, anchored, for starts).
Is the challenge that the signal sent is low power?
If you have any informative / instructive links, PLS post.
THX,
barnakiel
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04-12-2016, 10:37
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#38
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Registered User
Join Date: Feb 2011
Location: Meandering about the Gulf of Alaska coast [NNE Pacific]— where the internet doesn't always shine... [Even Elon's...] Homeport: Wrangell Island
Boat: Nauticat 43 [S&S Staysail Ketch]
Posts: 1,671
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Re: Internet-Independent Weather
Quote:
Originally Posted by RaymondR
Interesting, what software does the phone use?
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Raymond, Black Cat Systems makes a variety such apps for tablets, smartphones, and computers. [e.g., WeFAX, NAVTEX, even a very useful database of international HF/MF scheduled radio broadcasts by genre.]
In case this is worth exploring for your needs...
Cheers! Bill
__________________
SV Denali Rose
Learning every day- and sharing if I can.
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04-12-2016, 10:42
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#39
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Registered User
Join Date: Aug 2009
Location: between the devil and the deep blue sea
Boat: a sailing boat
Posts: 20,420
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Re: Internet-Independent Weather
Quote:
Originally Posted by Dockhead
(...)
Next year I will change my weather routine and start getting weatherfaxes via HF radio, and grib charts and forecasts via Getfile and Pactor.
(...)
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When a Pactor present, you can ping the NWS server and get radiofax files as email attachments. This is way more convenient than HF radiofax.
HF radiofax is sent at specific frequencies, specific times and at times simply impossible to get due to atmospheric things.
I only get HF radiofax on our own boat, but having used email / attachment radiofax service on other boats I would definitely opt for this method - you get what you want, when you want.
But not every radiofax agency is as good as NOAA. So having a HF radiofax is still the way to go elsewhere.
b.
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04-12-2016, 10:46
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#40
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Registered User
Join Date: Aug 2009
Location: between the devil and the deep blue sea
Boat: a sailing boat
Posts: 20,420
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Re: Internet-Independent Weather
Quote:
Originally Posted by wrwakefield
Raymond, Black Cat Systems makes a variety such apps for tablets, smartphones, and computers. [e.g., WeFAX, NAVTEX, even a very useful database of international HF/MF scheduled radio broadcasts by genre.]
In case this is worth exploring for your needs...
Cheers! Bill
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Any of the Apps available as a demo?
I do not by what I cannot try out.
b.
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04-12-2016, 10:52
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#41
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cruiser
Join Date: Nov 2007
Location: Probably in an anchorage or a boatyard..
Boat: Ebbtide 33' steel cutter
Posts: 5,030
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Re: Internet-Independent Weather
Quote:
Originally Posted by barnakiel
What about an antenna with lower dbi and a broader reception angle? (gps-style antena ?) Something that could work from a relative stable boat (say, anchored, for starts).
Is the challenge that the signal sent is low power?
If you have any informative / instructive links, PLS post.
THX,
barnakiel
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Have a look here..
https://outernet.is/docs
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04-12-2016, 11:18
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#42
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Moderator
Join Date: Mar 2009
Location: Denmark (Winter), Helsinki (Summer); Cruising the Baltic Sea this year!
Boat: Cutter-Rigged Moody 54
Posts: 33,764
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Re: Internet-Independent Weather
Quote:
Originally Posted by conachair
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Thanks; hot tip
I use DWD of course, but usually by Internet. I'll start doing this Also, I love RTTY and have a few different ways to decode it.
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04-12-2016, 15:43
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#43
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Registered User
Join Date: Aug 2009
Location: between the devil and the deep blue sea
Boat: a sailing boat
Posts: 20,420
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Re: Internet-Independent Weather
Quote:
Originally Posted by conachair
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Cool, but commercial. Do you have any good read for people who want to build this without buying ready made components?
If I am lucky and my current obligations resolve this year I could find time to build a kit next year. Maybe also prototype a boat antenna.
b.
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04-12-2016, 17:53
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#44
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cruiser
Join Date: Nov 2007
Location: Probably in an anchorage or a boatyard..
Boat: Ebbtide 33' steel cutter
Posts: 5,030
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Re: Internet-Independent Weather
Quote:
Originally Posted by barnakiel
Cool, but commercial. Do you have any good read for people who want to build this without buying ready made components?
If I am lucky and my current obligations resolve this year I could find time to build a kit next year. Maybe also prototype a boat antenna.
b.
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???
It's all on that page. There's a link to github for the open source software, the rtl link has a diy guide detailing what rtlsdr dongle to use and LNA etc with more links to home brew antennas ....
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05-12-2016, 00:14
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#45
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Moderator
Join Date: Mar 2009
Location: Denmark (Winter), Helsinki (Summer); Cruising the Baltic Sea this year!
Boat: Cutter-Rigged Moody 54
Posts: 33,764
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Re: Internet-Independent Weather
Quote:
Originally Posted by Polux
I understood badly what you mean by internet-independent weather. I assumed you were talking about providers that use information provided by different weather analysts and present several models independently from the ones that provide the information.. . .
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No, I meant getting weather when you don't have an Internet connection. But I guess that's clear by now -- this is a pretty old thread.
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