Tidal Atlas

[aquaplane]

Where can I get tidal flow info from?

Can I remember seeing it in an ancient Reeds?

I have NP 218 but I'm interested in the Irish sea.

[Nick]

Where can I get tidal flow info from?

Can I remember seeing it in an ancient Reeds?

I have NP 218 but I'm interested in the Irish sea.

Buy a Tidal Atlas - they are around £10 per volume and good value IMO

[Booby Trapper]

Bob

PM sent but it's ok I have your e-mail address already

Ian

[ubergeekian]

Buy a Tidal Atlas - they are around £10 per volume and good value IMO

Seconded. Probably the most used book on my boat.

[claymore]

They'll have them at the Wardens, but you could always stand on the surface and see which way its taking you....

[aquaplane]

They'll have them at the Wardens, but you could always stand on the surface and see which way its taking you....

I'm suprised at that, the Wardens don't even have tide tables, they muttered something about "when it rains".

I have now asked a kind man on the internet to send me the apropriate volume.

From the arrows in the 1977 Reeds it seems that the bit of water I'm interested in goes West after HW Dover and East 6 hours later, it'll be interesting to find out how fast.

[marisca]

My experience of the tide rates extracted from the Admiralty tidal atlas is that they are but a relative guide and definitely not to be taken as gospel specially in places like Mull of Kintyre, Sound of Luing, Dorus Mhor, Corran Narrows, etc.. For timings, apart from the nuisance of being referred to HW Dover, they're no bad but Claymore's Definitive Guide is easier and gives much better resolution. For further south I have only used Reed's wee diagrams.

I have often pondered on the vector diagrams I generated on the Yachtmeister desk-based course where tidal rates to 1 decimal place, constant headings to the nearest degree, leeway to an arbitrary number totally divorced from wind/sea state, and log speeds to the nearest knot were used to produce the "right" answer. And I'm not going to start on tidal depths to the nearest 10cm.

[Telo]

Claymore's Definitive Guide is easier and gives much better resolution.

Oh dear. He'll be unbearable now, like a cat with two tails....

[ubergeekian]

I have often pondered on the vector diagrams I generated on the Yachtmeister desk-based course where tidal rates to 1 decimal place, constant headings to the nearest degree, leeway to an arbitrary number totally divorced from wind/sea state, and log speeds to the nearest knot were used to produce the "right" answer. And I'm not going to start on tidal depths to the nearest 10cm.

Me too, and I used to teach shore based theory. However, I think there's a reasonable argument that expecting tidal height answers to 10cm is a reasonable way of checking that the right method has been used - as long as you make clear that a theoretical 10cm is not enough for crossing a cill!

[claymore]

Claymore's Definitive Guide is easier and gives much better resolution.

Oh dear. He'll be unbearable now, like a cat with two tails....

Claymore loves Shard.

Bob - I find if you aim at Douglas once clear of Morecambe bay and don't bother with the tides, you get there because its around a ten hour passage - half of it with the tide going one way and half with it going the other
Faultless logic

[Telo]

Claymore loves Shard.

Aw, that's awfy nice of you.

[aquaplane]

Bob - I find if you aim at Douglas once clear of Morecambe bay and don't bother with the tides, you get there because its around a ten hour passage - half of it with the tide going one way and half with it going the other
Faultless logic

Thanks for that, does the same apply if I'm going from Whitehaven to Loch Sween?
As far as I can tell the tide is either up the chuff or on the nose all the way.
With the best will in the world I can't believe that the tidal lift is going to turn our 5Kt motoring speed into 10Kts so that the 60 miles to Portpatrick will be done in one tide. I'll have to see which bit of foul tide is going to be the easiest to cope with, I'm guessing the bit nearest Whitehaven because the rates round MoG seem fast, I'll see when the Atlas comes.

The 40 miles to IoW looks like a good idea if we haven't been waiting too long for the weather.

After 2 years dithering we are finaly going to move the Centaur next Easter.

[ParaHandy]

Bob - I find if you aim at Douglas once clear of Morecambe bay and don't bother with the tides, you get there because its around a ten hour passage - half of it with the tide going one way and half with it going the other
Faultless logic

..... The 40 miles to IoW looks like a good idea ....

IoW? Isle of Wight? 10 hours eh? He's been oan ra juice, again ....

[claymore]

Is there a Douglas on the IOW as well as the IOM?

Bob - my best time was 18hrs from Troon to Whitehaven.
If you plug the tide to the Mull and get there just as it starts to run North you will get a decent run all the way to Sanda. I have never made it past Kintyre from the Mull of Galloway in one go.

its ok to go from Portpatrick to Gigha or Craighouse in a day (10 - 12 hrs) but I have found that to make it through the tidal gates at each of the Mulls has not been possible in one hit - just never been on a fast enough boat I suppose.

[Aja]

On the subject of tidal atlases, what is the difference (other than one covers more area) between NP218 and NP222 - I have NP222 on board. Is the detail of NP222 covered in the other?

Regards

Donald