Obtaining Tide Forecasts for Specific Global Locations: UKMO EasyTide
Abstract: In this
exercise you learn how to get 7-day tide forecasts for thousands of
ports, world wide. The URLs that request these products from the
UK server can be saved and used as links in a local guide to selected
Preliminary Reading (in
OceanTeacher, unless otherwise indicated):
|1. Run Saga and use FILE >
LOAD > SHAPE to make a map with the WORLD BORDERS data and the
Capital Cities data, listed above.
Zoom into the Liberia area to see
where these seven capital cities are located. We're going to find how
to get tide predictions for these locations, and add links to them on this
|2. Open the UKMO EasyTide
site and take a few minutes to read about it.
Then click on REGISTER
(lower right corner) and go through the registration process.
|3. Now that you are
registered and logged in, you'll see this notice. The PREDICT control
is available on most screens, and it is the way to get back to the beginning
of the process.
Click on PREDICT.
|4. You'll see 4 ways to find
the individual locations.
Click the MAP tab and you see these size-tiered
maps. It is not easy to use this method, but you are welcome to try
[HINT: Hover the cursor over the yellow dots to see their names.]
5. Click the AREAS tab to find this hierarchical
method. The AREAs are odd, but you can find locations after some work.
|6. Click the SEARCH tab to
find a method to simply look for ports by name. If you have a name and
the port is large, then this is the best way.
|7. Ignore the
FAVOURITES tab for now.
|8. Now you need to do two
- Check by ADD THE PORT
- Click on BISSAU (or the name of the port in question)
And no matter which tab you
choose, above, always use ADD THE PORT to save this choice in your list of
|9. Choose any time from 1 to
7 days. Then click PREDICT.
|10. A new page appears with a
graph and data table, but we won't use it. Find the VIEW PRINTER
FRIENDLY PREDICTION control, and click it.
11. This smaller page, with nice black and white
graphic appears. This is the product you need for your colleagues.
The following information is also provided, and is enlarged here for
you to read. It should be transmitted with the above graphic
whenever you share it with someone. You must make it clear
that this has been generated by the
UKMO EasyTide, under Crown copyright, and not by you personally.
The author of this exercise hereby makes the same declaration.
Daylight Saving Warning:
EasyTide predictions are based on the
standard time of the country concerned. For the UK this is GMT
(which is in force from 02:00 am on the last Sunday in October until
01:00am on the last Sunday in March). The specific dates of the
Sundays in October and March for the next three years can be found
on the directgov website at
The “Daylight saving” drop-down box in the top right-hand corner of
the screen can be used to convert the predicted times to “Daylight
Saving Time”. In the UK this is known as British Summer Time (BST)
and is one hour in advance of GMT. Therefore BST applies to dates
and times outside those mentioned above.
Please note: The data provided by the
EasyTide service has not been designed to meet the specific
requirements of any particular type of user. It is therefore the
user's responsibility to ensure that the data is suitable for their
intended purpose. EasyTide is not designed for use by vessels
operating under SOLAS regulations. For such vessels, the UKHO has
developed specifically designed products such as the
Admiralty Tide Tables or
Admiralty TotalTide. The UKHO does not accept responsibility for
any amendments or changes to the data in the EasyTide service made
during its transmission or in the process of displaying or printing
or conversion into alternative formats on the user's equipment, or
for any modifications or unauthorised changes made by licensees or
13. Before you close the window for the PRINTER
FRIENDLY VERSION, you must look at the top line of your browser and SAVE the
complete URL, as you see here:
This is one of the hyperlinks for the Ports Tide Map you
will make below. Save it in a text document with any good ASCII
|14. Now we have
BISSAU in our FAVOURITES, and a URL for a 7-day prediction there.
We'll go on now to get the same results for the other 6 capitals in the
You can close the PRINTER FRIENDLY VERSION and go back to the main
|15. Find this notice and
CLICK HERE to begin the prediction process again (where you were in Panel 3,
Or click on any control that simply says PREDICT, if you don't see this
exact same control.
|16. Now you're back in the
location selection process.
|17. Go through
all 6 other locations:
- Find each one in EasyTides list of 7000 sites
- Add each one to your FAVOURITES list
- Get the PRINTER FRIENDLY VERSION of the 7-day forecast for each site
- Save the URLs for all PRINTER FRIENDLY VERSIONS in the same text
file with BISSAU, for a total of 7
|18. If you look at your
FAVOURITES now, you should see these 7 sites.
|19. Here is the same map you
saw in Panel 1. You can use any good HTML editor to
- Place the map graphic on an HTML webpage
- Add a "hot spot" at each of the 7 coastal capitals, linked to their
tide charts using the 7 URLs you saved above.
Click on any one of the coastal capitals to see how the EasyTide forecast
map appears. These will always be updated automatically to cover the
latest 7-day period. This map would make a terrifically effective new
object on your website, but make sure to label the graphic appropriately, as
the author has done here.
Regional Ports Tide Forecasts
7-day tide forecasts from the
United Kingdom Meteorological Office Admiralty EasyTide online
utility. They are provided here for scientific assessments and not for
navigation or engineering.
|20. "Any good
HTML editor" - This is entirely up to you. This author uses Frontpage
2003, which is a commercial product. You might want to go through
Wikipedia's List of Free HTML Editors, cited above.