QHM Tides.

[burgundyben]

See link, does anyone understand how the %ages are calculated?

DaysTides | Royal Navy

 

[Sandy]

I've always found the %age way of describing the difference between low and high water very confusing as we don't use it much in the UK.

There is an explanation here that works for me. I prefer to see the difference in meters as I find it easier to think in numbers.

 

[Boathook]

Is it something to do with the range? I did notice 110%.

 

[dunedin]

I've always found the %age way of describing the difference between low and high water very confusing as we don't use it much in the UK.

There is an explanation here that works for me. I prefer to see the difference in meters as I find it easier to think in numbers.

By contrast I found the tidal coefficients, as used widely in France amongst other places, very helpful, and now use in UK also. Useful specifically because they are simple and objective “numbers” to get a rapid view of how strong a tide might be.
Need to refer to extra tables (or knowledge) to convert a range to whether it is a super strong or weak tide - whereas knowing it was an exceptional 112% coefficient tide when heading into Gulf de Morbihan at mid tide certainly was a warning to expect a bit of tidal flow.

 

[Sandy]

By contrast I found the tidal coefficients, as used widely in France amongst other places, very helpful, and now use in UK also. Useful specifically because they are simple and objective “numbers” to get a rapid view of how strong a tide might be.
Need to refer to extra tables (or knowledge) to convert a range to whether it is a super strong or weak tide - whereas knowing it was an exceptional 112% coefficient tide when heading into Gulf de Morbihan at mid tide certainly was a warning to expect a bit of tidal flow.

We are all different. One of the great joys of humanity.