I presume you’re up to speed on Middle English prose (St. Marher, 1225 courtesy of www.phrases.org.uk) – if not then you’ll be familiar with the more contemporary form.
Anyway back to 2008 - Jasper and I were chatting the other day about how to make best use of the function on watches such as the Casio Sea-Pathfinder (nothing fancy – about twenty quid) for indicating and predicting tidal movement. By inputting data for lunitidal interval and longitudinal difference from the Greenwich Meridian these watches can be set to give a fair indication of the state of the tide. The website of the Proudman Geographic Library (PGL) (http://www.pol.ac.uk/ntslf/sharing_knowledge.php) provides the required data for a range of locations relevant to the trip such as
For those of you who may not be familiar with this concept: The high water lunitidal interval (or high water interval) is the time interval between the moon's transit and the next high water.
It’s the difference between moon up and the high tide immediately following moon up. Moon up is when the moon is directly over the person's longitude, not when it rises. Under ideal circumstances, the high tide and moon up time would be the same. Friction and the ocean floor cause the ocean to move at a different rate in different areas. (http://pathfinder.casio.com/support/).
On the subject of tides, the PGL website also has 28 day tidal predictions for the
The BBC give six day tidal predictions on a more localised basis and includes times and heights for high and low water for any number of ports along the coast of
There we are then – that’s possibly the anorakiest thing I’ve ever written. More to follow I’m sure. Bye for now.
1 comment:
Dude, you really need to get out more...or employ a whole team of counsellors to help you with you watch/tide/neoprene underwear obsession
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