Weather Fax - Page 2 - SailNet Community
 6Likes
Reply
 
LinkBack Thread Tools
post #11 of Old 04-23-2013 Thread Starter
tdw
Super Fuzzy Moderator
 
tdw's Avatar
 
Join Date: Oct 2006
Location: Sydney Australia
Posts: 16,162
Thanks: 11
Thanked 99 Times in 93 Posts
Rep Power: 10
     
Re: Weather Fax

Thanks to you all but especially you Dave.

Cameron, in regard to ongoing cost that seems to depend on whether or not you sign up with a specific weather guru.

Andrew B

“Life is a trick, and you get one chance to learn it.”
― Terry Pratchett, Nation

Malo 39 Classic

Last edited by tdw; 04-23-2013 at 11:04 PM.
tdw is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #12 of Old 04-24-2013
Mermaid Hunter
 
SVAuspicious's Avatar
 
Join Date: Oct 2006
Location: on the boat - Chesapeake
Posts: 3,984
Thanks: 0
Thanked 158 Times in 141 Posts
Rep Power: 9
 
Re: Weather Fax

No ongoing costs.

See http://www.nws.noaa.gov/om/marine/rfax.pdf for worldwide broadcasts.
jameswilson29 likes this.

sail fast and eat well, dave
S/V Auspicious
AuspiciousWorks.com
beware "cut and paste" sailors.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
SVAuspicious is offline  
Quote Quick Reply Share with Facebook
post #13 of Old 04-25-2013
Senior Member
 
chef2sail's Avatar
 
Join Date: Nov 2007
Location: Maryland
Posts: 7,074
Thanks: 30
Thanked 58 Times in 54 Posts
Rep Power: 8
 
Send a message via AIM to chef2sail
Re: Weather Fax

Dave ,

Could you repost your directions for tuning in the radio and setting up the computer to receive the weather fax. I can't find your directions. From before.

Thanks

Dave


QUOTE=SVAuspicious;1020518]Warning: I am a weather geek. Lee Chesneau, Frank Bohlen, and Frank Singleton are friends.



Weather fax is my primary source of weather information. On Auspicious I have an Icom M802 SSB, Pactor PTC-IIpro, and Airmail/Viewfax on my boat computer. On delivery I use a Kaito KA-1103 shortwave radio and JVCOMM32 on my laptop; assuming you have a laptop the latter set up is around $200US.



Correct as far as it goes. You can get weather fax graphics or gribs over e-mail using either a satellite phone or HF radio. E-mail is fundamentally a one-to-one communications mechanism, so if you and five other boats near you want the same information it is sent six times. Consider what happens with tens or hundreds of boats in a region. Very poor efficiency and not good neighborliness.

Weather fax on the other hand is a one-to-many transmission, just like broadcast radio. One transmission that everyone receives in parallel.

The obvious question is what one gives up by using weather fax. The easy answer is: NOTHING. In fact you are better served even if you care not a wit for your neighbors. Weather fax transmits products based on a number of computer models considered by a meteorologist who adds value based on his or her expertise. Gribs come directly from a computer model (usually GFS) untouched by human hands. *Warning - geeky stuff* The GFS model in particular assumes a continuous second derivative over the barometric pressure surface. *end geeky stuff* What that means is that sharp changes in pressure like fronts don't show up on gribs. Now some met offices are working on ways to show weather features like fronts in gribs it isn't either reliable or generally available yet.

So you can use the tried and true weather fax products that show the best available forecast or choose gribs for a more expensive, less efficient, and less effective product.



At least in the US when the US Coast Guard floated the idea of terminating weather fax services there was an uproar from the commercial vessels and the recreational cruising community. Everyone was surprised at how many consumers there continue to be.[/QUOTE]


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
___________________________
S/V Haleakala (Hawaiian for" House of the Sun")
C&C 35 MKIII Hull # 76
Parkville, Maryland
(photos by Joe McCary)
Charter member of the Chesapeake Lion posse

Our blog-
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


“Sailing is just the bottom line, like adding up the score in bridge. My real interest is in the tremendous game of life.”- Dennis Conner
chef2sail is offline  
Quote Quick Reply Share with Facebook
post #14 of Old 04-26-2013
Junior Member
 
Join Date: Mar 2007
Posts: 2
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 0
 
Re: Weather Fax

Anyone have experience with the Furuno nx300 paperless navtex? Not having an SSB it seems like a worthwhile investment. But in the product description it touts how it broadcasts weather warnings among other information. Weather warnings are great but if you already out there in it, it can be preaching to the choir! How about a forecast? Will it give weather forecast information, say 96 hours out?
moinak is offline  
Quote Quick Reply Share with Facebook
post #15 of Old 04-27-2013
Mermaid Hunter
 
SVAuspicious's Avatar
 
Join Date: Oct 2006
Location: on the boat - Chesapeake
Posts: 3,984
Thanks: 0
Thanked 158 Times in 141 Posts
Rep Power: 9
 
Re: Weather Fax

Quote:
Originally Posted by chef2sail View Post
Could you repost your directions for tuning in the radio and setting up the computer to receive the weather fax. I can't find your directions. From before.
rfax.pdf has guidance.

Geeky radio context: radiofacsimile is transmitted as frequency shift keying (FSK). Dedicated wefax receivers are FSK receivers. Those of us that use single sideband (SSB) (usually upper sideband (USB)) have to offset our tuned frequency from the transmit frequency in order to regenerate the tones for the fax demodulator.

What does that mean? Set your radio to USB (or SSB in shortwave radios like that Kaito KA1103) and tune 1900 Hz (1.9 kHz) down from the listed frequency. Everything just works from there.

sail fast and eat well, dave
S/V Auspicious
AuspiciousWorks.com
beware "cut and paste" sailors.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
SVAuspicious is offline  
Quote Quick Reply Share with Facebook
post #16 of Old 04-27-2013 Thread Starter
tdw
Super Fuzzy Moderator
 
tdw's Avatar
 
Join Date: Oct 2006
Location: Sydney Australia
Posts: 16,162
Thanks: 11
Thanked 99 Times in 93 Posts
Rep Power: 10
     
Re: Weather Fax

Quote:
Originally Posted by moinak View Post
Anyone have experience with the Furuno nx300 paperless navtex? Not having an SSB it seems like a worthwhile investment. But in the product description it touts how it broadcasts weather warnings among other information. Weather warnings are great but if you already out there in it, it can be preaching to the choir! How about a forecast? Will it give weather forecast information, say 96 hours out?

I don't have any experience with Navtex (the network does not extend to Australia) but the FX-30 is both a paperless WF and Navtex unit. While I don't need the Navtex I'm pretty sure that this is what we will end up with. Simply downloads the WF into a puter and you can print from there if you wish.

Andrew B

Andrew B

“Life is a trick, and you get one chance to learn it.”
― Terry Pratchett, Nation

Malo 39 Classic
tdw is offline  
Quote Quick Reply Share with Facebook
post #17 of Old 08-21-2013
Junior Member
 
Join Date: Dec 2002
Location: Ft.Pierce
Posts: 17
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 0
 
Re: Weather Fax

No mention of the Xaxero USB Weather fax 2000. Uses the headphone socket of your SSB and plugs into the computer with a USB plug. Used it through the Caribbean and where poss in the Pacific. Backup was the Iridium phone with access to Maxsea weather data. (plus email proper)
gerrycooper is offline  
Quote Quick Reply Share with Facebook
post #18 of Old 08-22-2013
Senior Member
 
redline's Avatar
 
Join Date: Feb 2010
Posts: 189
Thanks: 1
Thanked 9 Times in 8 Posts
Rep Power: 6
 
Re: Weather Fax

While just playing around, I installed HF Weather Fax from Black Cat Systems on my iPad. Expecting to have to make a cable from my Icom M802 headphone jack to the iPad (as an electrical engineer, I didn't expect it to be much effort), I was surprised to find that no only does it work by simply placing the iPad near the Icom speaker, it gave me perfectly clear weather maps right from the start. Not bad for a free app and zero hookup!

I would definitely do something more serious for a real cruise, but for those interested in learning more, or as a backup, it's hard to beat.

Norman
s/y "Redline"
1998 Jeanneau SO45.2
redline is offline  
Quote Quick Reply Share with Facebook
post #19 of Old 08-23-2013
Junior Member
 
Join Date: Dec 2002
Location: Ft.Pierce
Posts: 17
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 0
 
Re: Weather Fax

JVCOMM32 is about $88 for the full program now, while Xaxero WeatherFax2000 sound card edition is $89.
gerrycooper is offline  
Quote Quick Reply Share with Facebook
post #20 of Old 08-23-2013
Senior Member
 
Join Date: Feb 2010
Location: Narragansett Bay
Posts: 10,791
Thanks: 45
Thanked 216 Times in 201 Posts
Rep Power: 7
   
Re: Weather Fax

Quote:
Originally Posted by gerrycooper View Post
....Uses the headphone socket of your SSB and plugs into the computer with a USB plug......
I still don't get why this isn't available to plug into an iPad port, so that a one-button app could read and display it. Apps that display gribs files are plentiful. I'm not a tech guy, but it seems it just shouldn't be all that cutting edge.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Jeanneau 54DS

In the harsh marine environment, something is always in need of repair. Margaritas fix everything.
Minnewaska is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
What frequency do toy dail in to pick SSB weather report and weather chart? rockDAWG General Discussion (sailing related) 10 04-10-2013 05:17 PM
weather fax kennyarmes Gear & Maintenance 2 08-20-2008 04:28 PM
Where do you get your weather wchevron General Discussion (sailing related) 24 06-09-2008 01:33 PM
weather lawriegubb Gear & Maintenance 7 02-14-2008 05:19 PM
The Weather Fax Jim Sexton Gear and Maintenance Articles 0 10-20-1999 08:00 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome