Idle question re secondary ports

My plotter will do the sums for me so I dont bother now, but have used them in the past for idle curiosity. /forums/images/icons/smile.gif

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Couldn't tell you the exact level of the tops of the blocks off hand but I have also seen them at low water and worked out that at high water springs there must be about 3 metres of water over them. So in theory I can sail straight across the barrier at high water springs. Never dared to try it though.

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Had to d it for YM but never before or since. I just take a quick look at the tidal differences and interpolate mentally to get an estimate, if it looks close then I go to plan B.

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Acshully I like working out tides and fings, I know I can get the confuser tae dae it fur me .. but I like sitting there with ra almanac and wee bits of paper, dae the same fur tidal streams and courses to steer.

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I've done it at HW+2, but seeing the rocks gave me a bit of a cold shiver. There's progressively more water towards the fort, but I stick to the gap, these days.

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I really like the bit at the end of the trip when I get the almanac out again to work out how the feck I cocked up. /forums/images/icons/smile.gif

I know it's sad but I do enjoy doing a full passage plan, tidal streams etc., rather than leaving it to the confuser.

<hr width=100% size=1>Think I'll draw some little rabbits on my head, from a distance they might be mistaken for hairs.
 
Yeah, before it was officially declared open - but Peter Bruce had said years b4 that there was nothing left of the barrier. First time I did it, though, I followed close on the heels of a bigger boat.

<hr width=100% size=1><A target="_blank" HREF=http://www.writeforweb.com/twister1>Let's Twist Again</A>
 
Normally ...

Can't be arsed to work it out ..... I often take nearest Primary port and then work to nearest 30 mins ..... as I have bilge keels and don't mind a bit of putty time .....

There are very good crib sheets inside the Admiralty Tide Tables and using this - you can do a good job quite quickly. But of course you have to find a nice kind 2nd Mate on a ship to copy it for you !!

I'm always surprised by the levels RYA courses go to .... commercial navigators only spend limited time on this and are pointed to above said Adm. Crib pages ........ we being expected to learn this stuff on board without Professor Blackbeard etc.

Not much help to original post my reply really .....


<hr width=100% size=1>Cheers Nigel http://groups.yahoo.com/group/gps-navigator/ http://groups.yahoo.com/group/searider/
 
Sailing out of Christchurch one needs a pragmatic approach as the tidal predictions are at best a bit of an estimate. The trick is to go down the river, on a rising tide, and then plough a furrow through the mud.
Coming back of course you aim to get to the entrance just after second high and then check the water height on your favorite mark on the quay to tell how much water is likely to be in the channel.
Tide calculations, whats that for?

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It really is all a bit academic - It supposes that there were no gales last winter - no sand or mud shifted or he odd rock in a tidal surge...... How much swell is there? I think a lot of pilotage is instinct not mathmatics.. Mind you a good echo sounder helps..

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I agree- Passage Plans are usually best worked out over a bottle of wine, then the mistakes really are a surprise /forums/images/icons/laugh.gif

<hr width=100% size=1>Life's too short- do it now./forums/images/icons/wink.gif
 
Re: \'fessing up part trois

I made the mistake in Brittany of using tide tables that were on GMT. Viewed the Glénans from a new angle...

John

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