Updating charts

[jonathankent]

I am about to start updating my charts in preparation for the season. Is there a correct method to this, i.e. labelling, colour, etc or is a 'normal' black pen good enough?

 

[Phoenix of Hamble]

Tradition says the corrections should be in a purple colour..... otherwise, just add new symbols to teh chart as they would normally be displayed.... I tend to cross out bouys that are removed so that you can still see what they were... so that you can positively see what has been removed....

Best is with a very fine tipped pen, as sometimes the space can be limited.... and make sure it dries water resistant!

 

[Poignard]

The UK Hydrographic Office publish a book called "How to Correct Your Charts the Admiralty Way" NP294.

It tells you all you could ever wish to know, except how to avoid buying charts that are soon to be superseded by new editions!

 

[ruff_n_tumble]

I find most pens are not fine enough to draw symbols precisely enough, so I use a Staedtler pigment liner 0.05mm. They only come in black unfortunately and I've not been able to find the equivalent in magenta. Very fragile point, I've ruined one by pressing a bit too hard. The ink is also waterproof.

 

[jonathankent]

I thought I had read about purple somewhere, but wasn't sure if there was a correct method.

I will also look into twisterowner's link.

Thanks.

 

[Malcb]

Use Purple. Don't use red as that colour does not show under a red light, and black tends to blend in with the rest of the annotations on the chart.
Kelvin Hughes do sell a chart correction set consisting of a plastic stencil for most, if not all, the shapes you need plus two pens, one purple and one red. I can't remember how much it costs. I got mine from Kelvin Hughes in Southampton last year.

 

[ShipsWoofy]

I use rotering and too could not find magenta ink. I am not going to try normal inks through them, they are a pig to clean, though not as bad as the Staedtler pens, you can never get the wire back up the tip on the really fine ones.

 

[ShipsWoofy]

that would be like your first chemistry stencil, looking forward to drawing out experiments, or was that just me /forums/images/graemlins/frown.gif

 

[bumblefish]

I would recommend starting with the last correction and working backwards, or at least read them all before starting. I once very carefully inserted a submerged wreck, danger to surface navigation, only to have to delete it later in the same series of corrections!

 

[Poignard]

How about Pilot Hi-tecpoint V5 Extra Fine, available in a sort of purple colour? I found them in a local stationers: Lorimers in Purley. They are a very fine tipped felt pen, ok for ordinary paper but smeary when used on Imray's plasticised paper.

 

[Phoenix of Hamble]

Thats what I use.....

 

[simon_sluggett]

I need to update my chart and have not done this before. I have an imray chart C15 printed march 2004. There was a reprint Sept 05 and the website has corrections only for this edition. How do I know there were no corrections between march 04 edition and the latest.

 

[KRG]

I had a similar problem with the Admiralty leisure folios, but you can use the originating full size chart corrections which are listed for much longer. Surely, if there is an important change for the Admiralty it will apply to the Imray, just a question of cross reference for the area, worth a try.

 

[Superstrath]

From Imray' site:
Please Note : Charts that have been superseded by new editions cannot be corrected. Correction Notices on this site are correct to the date specified on the notice, please check back from time to time to keep your charts up to date

You can't update an obsolete chart. This applies to Admiralty charts as well. If there's a new edition, then you need to buy it.

Alistair

 

[KRG]

I'm not sure, e.g. Admiralty 3418 Chichester and Langstone, some of the charts in the solent folio originate from this, the folio has been updated from 2004 but there are still corrections available for the main chart back to 2000.

 

[Sans Bateau]

A lot of the corrections and updates are only conformation of the depth of a wreck etc. This may be at a depth that will have no effect on us the leisure sailor, so dont waste your time making that correction.

When I last updated my charts, about 80% was IMO non relevant.

 

[jonathankent]

Surely if you keep on top of correcting your charts, when the new edition comes out it will be the same as your corrected one. Then you can continue to use the corrections for the new chart.

This is assuming the new edition is just a corrected version of the old one.

 

[Superstrath]

I wouldn't profess to know the details or that chart or that folio, but the fact remains, New Editions will contain features or changes that will not be reflected in the NMs for the old chart. That's why they're issued. It's a pain in the wallet replacing charts, but it's a false economy to keep outdated ones in use, and a totally pointless exercise trying to apply corrections to an old chart.

Alistair

 

[Sans Bateau]

When you make the correction, you should put the date in the margin of the chart update. Then when you look down the list of corrections from HMHO you can see if you have the latest updates.

You only really need buy a new chart when it gets to tatty or the updates are filling up the blue bits!

 

[Sans Bateau]

Dont you think though that the new chart is issued because if you are buying a chart for the first time, you want the latest version? After all none of the main features are likely to change.