Navigation Mac

The blog

Receive graphical weather maps on iPad [Update]


Weather analysis and forecasting maps developed by the NOAA (USA) and the Met Office (UK) cover vast areas over the Wold. They can be obtained sending a request by email to the weather server of british company MailaSail. With the latter, many maps are available in a listing (¹) in which simply click on the links to load the request in a message ready to send.

The page containing these links can be saved in RTF format in the Apple app "Files" carefully choosing "Location > On my iPad" and taking care to create a "Weather" folder in it beforehand, to be used on a regular basis for new requests from the tablet.

Storing MailaSail responder listing

Two file formats are available for each weather graphic : standard size (about 40-60 KB) and reduced (SMALL : about 20-30 KB). So we can get these maps by satellite phone choosing the SMALL size. A simple tap on one of the links opens the editor window in Apple Mail prefilled.

Reception in Apple Mail

Once received in Apple Mail, the graphic is displayed as an attachment after the text. A tap on the image allows to share with Apple app "Books».

Recording the weather map in Apple Books

Reception in Iridium Mail & Web or XGate

Same as above. But it will make a copy and paste the file name, or enter with keyboard (in example : PYAA11.TIF all caps) in the field "Object"And enter the email address" », leaving empty the text.

Request entered in Iridium Mail & Web

These graphical weather maps are an excellent complement to GRIB files, including in navigation on the high seas. They are easily downloaded by satellite phone thanks to small sizes.

(¹) Download MailaSail weather maps request listing


Author : Francis

Since 2009 independent IT trainer and consultant for boating. Translator of many navigation applications on iOS and MacOS. Professional in boating for over 25 years, I provide training for applications and consulting and assistance for the integration of mobile devices (tablets, smartphones) on pleasure boats.


  1. Really interesting, Thanks for sharing this!

  2. These weather maps are more than an add-in: They should be the basis of work to make a routing decision and should be treated with respect. A professional meteorologist worked there for several hours and took the time to do an analysis of the situation in depth. Ago put all his knowledge even signed it with his name under the heading FORCASTER. Just for NOAA, It's a small group under 100 people who sign these cards. As opposed, a GRIB file is only the result of a calculation algorithm.

  3. Francis thank you for this update 16 March .
    It is well understood GRIB, the human is still necessary until a Supra Artificial Intelligence.

  4. Thank you Francis, super!

  5. Thank you Francis, it's great

  6. Thank you very useful for my weather workshop with my club the RYCV

Leave a comment

Required fields *.

This website uses Akismet to reduce unwanted. Learn more about how the data are used for your comments.