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Posted By Discussion Topic: tides

Similar Threads That Might Help :
Broads Tide Calculator| The Tide is High....| Tide Tables| Tide Tables| High Tide| Potter Heigham Bridge and high tides|

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Marshman
Aug-09-2018 @ 11:50 AM                           Permalink
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Mardles sometimes
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As the tides then are approaching springs, the 2 hours you anticipate from Reedham is probably plenty.

If I was planning that, I think I would have another 1/2 hours kip or not rush my breakfast!! It may mean pushing the first of the flood a little longer across Breydon but I think if you leave that early you will be be punching that ebb through the Yacht Station for longer than you think!

And for what its worth, tides tend to run later than earlier!

BuffaloBill
Aug-09-2018 @ 1:04 PM                           Permalink
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Mardles sometimes
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Marshman is correct. Although the water level will be
rising at the Yacht Station, the tide nearer the surface
is still ebbing. Sounds rather odd but if you spend
any time at the YS you will see what we mean. Going from
South to North, arrive at the YS around 30 minutes after
the published slack water time. Assuming that airdraft
is not a problem of course!

The older I get...
The better I was....!!

bikerinky
Aug-09-2018 @ 1:37 PM                           Permalink
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bill
thats probably why i kept getting it wrong, watching the last of the ebb at yarmouth and it not tallying with the tide table. anyway, im all for an extra half hour lay in. so will it still be a 2 hour trip going with the tide? i doubt ill be going flat out on breydon, song of freedom is an old girl and i dont want to break her.
ian
song height is 7'3"
Ian boating since 1961

This message was edited by bikerinky on Aug-9-18 @ 1:38 PM

ranworthbreeze
Aug-09-2018 @ 1:48 PM                           Permalink
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We also use the Broads Authority tide tables, we find it to be the only one that gives a height at low tide, the height is important to us having an airdraft of 9 ft 8 inches with the canopy and masthead down; to calculate if the passage through the Yarmouth Bridges is indeed possible.

Regards
Alan

BuffaloBill
Aug-09-2018 @ 4:28 PM                           Permalink
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Mardles sometimes
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You should, under normal tide conditions, have around 8ft
under the bridges and as you will be going downstream from
Reedham on a fairly fast ebbing tide it would take around
1.5hrs. That's what it takes me using just a very fast
tickover, about 1000rpm. As you get about halfway across
Breydon, you will notice your speed slowing as you meet the
flooding tide but it pays back with the help it gives you
going up the Bure towards Acle.

The older I get...
The better I was....!!

Marshman
Aug-09-2018 @ 5:53 PM                           Permalink
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Mardles sometimes
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And you still will not get it exactly right but those figures will get you there or thereabouts. Don't forget its spring tides too so you will be hammering down to Berney and the first of the flood should be no problem at all although it should be beginning to run a bit for the last 800m or so through Breydon bridge. Better to shove it there rather than all the way to Acle!!!

Remember the later you can actually get to the Bure the easier it will be going up - going north is always the trickier one timing wise. Going south its all a piece of cake - normally!

FreemanBattyBat
Aug-09-2018 @ 7:23 PM                           Permalink
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For the princely sum of £1 you can buy the whole years Broads Authority tide prediction booklet.
It also includes such useful information as bridge clearance, destination distances, and general need to know info.
Probably cheaper than DIY  paper and printer ink cost !

Freeman F23 Flittermouse moored near
Geldeston


This message was edited by FreemanBattyBat on Aug-9-18 @ 7:24 PM

bikerinky
Aug-09-2018 @ 9:19 PM                           Permalink
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Thank you Bill and marshman, I always thought there was between 11 and 12' clearance in Yarmouth at low tide or does it rise that quickly to 8' only a half hour after slack water
I'm only a once a year visitor so assumed that the rate of rise and fall would be even throughout the 5 and 7 hour flows.
Sorry to keep going on, you'd think I'd know better the amount of times I've been there.
I did this journey in 2011 on silver scirroco at 4:30 am and in a pea Souper of a fog (and it was an excellent challenge which I thoroughly enjoyed) but was just aiming for low water slack and yes I remember having a hard slog through Yarmouth for quite a time, but at least by this time the Mrs was up and I got a cuppa

Ian boating since 1961

BuffaloBill
Aug-10-2018 @ 8:07 AM                           Permalink
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Mardles sometimes
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Low tide and slack water are not the same thing. You can
get around 11-12ft at low water but as I mentioned
earlier, the wind and moon etc. can make a difference.
The 8ft I mentioned is only a guide and you may well
have more than that but that is usually what I see when
I go through.

The older I get...
The better I was....!!

Dilligaf
Aug-10-2018 @ 12:34 PM                           Permalink
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I normally aim for LW + 1-1.5hrs and get under fine with an airdraft of 8'8" with plenty of clearance.
It doesn't work in rivers but on the open sea it's the rule of twelths for amount of rise/fall.
1st hour = 1/12 of total range
2nd hour = 2/12 of total range
3rd hour = 3/12 of total range
4th hour = 3/12 of total range
5th hour = 2/12 of total range
6th hour = 1/12 of total range
so near HW or LW you get the slowest level changes and half tide gives the fastest level changes but.....
When you add river flow and narrow channels and a confluence it all goes wrong.

Dave.
Formerly 'LeoMagill'

Marshman
Aug-10-2018 @ 12:51 PM                           Permalink
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Mardles sometimes
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But Dave as you do admit, has little bearing on the Broadland Rivers, even at the Yacht Station!! I don't think that yardstick, so invaluable at sea, is very relevant at many places in the Broads -  I can think of many exceptions and the Lower Bure is one!!

Potter is another, as is Beccles and it is all thrown out of kilter by, generally the amount of fresh water coming downstream and accounting for the 5hrs flood, and 7 hours ebb rule of thumb mentioned earlier in the thread. And that too is a load of rubbish in some places!!

And even that varies from place to place - as commented up on earlier tides cannot read tables and they are for guides only!

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