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Old 23-04-2018, 05:13   #1
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Irish hourly tidal current gribs

Reported by Maelruan

http://www.cruisersforum.com/forums/...ml#post2079694

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Old 25-04-2018, 15:40   #2
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Re: Irish hourly tidal current gribs

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Originally Posted by rgleason View Post
I took a look at this and I can't see how to get a grib from it, has anyone managed to do so?
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Old 17-05-2018, 16:37   #3
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Re: Irish hourly tidal current gribs

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Originally Posted by AedanC View Post
I took a look at this and I can't see how to get a grib from it, has anyone managed to do so?
I find the gribs very detailed and accurate - even inshore eddies identified in some sailing directions are shown. The data are now available only in meters per second which works with OpenCPN etc, and timed for UT. Gribs are no longer offered in knots. The Irish Marine Institute supplied the following access instructions:

"The GRIB files containing surface currents are stored on a password-protected location on the Marine Institute FTP server. Please read the document, contents.docx, for a description of the files available on the FTP site.
Access details are as follows.
Browser access
1. In browser type following address: https://sftp.marine.ie/.
2. This will bring up a login screen. The following details should be entered:
Login ID = ftpossapp2
Password = FtpOssapp2
Click the Login button to access the FTP site
3. Now navigate to the following location by clicking on the appropriate folder icons:
OSS/modelling/GRIB_Files

4. Right-click on your chosen file and pick the Download option. Download to your desktop.


Command line access
If you are familiar with accessing web data via command line then the following is an example of how to use wget to dowload a file to your working directory:
wget ftp://ftpossapp2:FtpOssapp2@ftp.mari...tic_sea_kn.grb celtic_sea_kn.grb"

As gribs in knots are no longer offered change "kn" to "ms".
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Old 18-05-2018, 00:12   #4
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Re: Irish hourly tidal current gribs

Sailing the Irish south-east coast at the minute.



The gribs compare well with charted tidal diamonds (0.1-0.2 differences mostly). Much more comprehensive coverage compared with the diamonds, as Maelruan says.



Diamond data was loaded into OpenCPN with the NTCurrent plugin from VisitMyHarbour allowing a direct comparison at the site of the diamonds.


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