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Old 04-03-2018, 10:14   #31
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Re: How to receive Weather Faxes

Thank you guys. I am working on and will have my sideband working properly by next crossing in May. Still trying to digest your advice on recieving the faxes via Iridium go. I am using the iridium mail for emails. Sadly that system is on hold until early May. No point in paying the 125 a month while sailing coastal NZ. I really appreciate your help guys. Cheers
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Old 04-03-2018, 15:20   #32
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Re: How to receive Weather Faxes

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Originally Posted by Bleemus View Post
He indicated he was not confident his SSB was working properly. These units are stand alone if you attach an antenna. Used one for ten plus years all around the world. No satellite fees, no Sailmail fees. They just work.
Sorry what units are you referring to?
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Old 04-03-2018, 16:26   #33
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Re: How to receive Weather Faxes

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Sorry what units are you referring to?
Furuno Dfax.
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Old 04-03-2018, 21:28   #34
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Re: How to receive Weather Faxes

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Originally Posted by philiosophy View Post
Yes those pesky fronts. In these parts identifying said fronts and the direction they are taking is sooooo very important. It is my belief the NOAa weather charts are written by real meteoroligists two maybe three times a day. Grib files are nice and easy to read. Just not that much recent human content. The waters between NZ and the Islands north of us are serious business....
Bear in mind that the meteorologists don't have a crystal ball to look at the future weather, they are looking not the same computer models you're so down on.
Wfax is great offshore but so are gribs. even better is both.
With a little practice the fronts are there, just look,for the wind shifts and bands of rain.
OpenCPN has excellent weather display options, overlay gribs on weatherfax on Sat images. Worth starting to practice now
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Old 04-03-2018, 21:38   #35
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Re: How to receive Weather Faxes

From the warning that comes with SailMail gribs....

'Also remember that grib data is not reviewed by forecasters before being made available. You are getting a small part of the raw model data that the forecasters themselves use when writing a forecast, and it is your responsibility to make sure that the data is consistent with your local conditions and with the professionally-generated forecasts (e.g. text bulletins and weather-fax charts).
Grib data also has limitations along shore, where local effects often dominate and may not be adequately modeled. In addition these models cannot provide adequate prediction for tropical systems, frontal activity or convergence zones. For example, while global models can provide useful data on the likely track of hurricanes, they grossly underestimate the strength of hurricanes because of their small size compared to the model grid. For hurricane/cyclone forecasts, carefully monitor the appropriate warning messages and do not rely on grib data from any source.
That all said, grib data can provide useful guidance not available elsewhere. Understand the limitations and use the data carefully. Grib data should be considered supplemental to other forecasts, and not be relied upon in lieu of professionally-generated charts or forecasts.'
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