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22-01-2014, 00:43
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#1
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cruiser
Join Date: Dec 2012
Location: Seattle
Posts: 1,129
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Correcting Charts
For all you guys who are navigators or officers, where did you learn to correct charts?
Technical school? Academy? Is there a class where they sit you down and say "This is a Local Notice To Mariners. This is a chart. To correct the chart, this is what you do."?
I just learned here that there's a difference between a discrepancy and a correction, and Bowditch says corrections should be made in pen.
So I'm wondering where those of you who are licensed pros learned to do this The Right Way.
I'd like to learn The Right Way, and short of joining the Navy, I'm willing to take a class if I have to.
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22-01-2014, 01:08
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#2
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Registered User
Join Date: Feb 2010
Posts: 619
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Re: Correcting Charts
British Admiralty: NP 294 "How to keep your Admiralty Charts up to date" is a comprehensive source, that should be sufficient.
Many Chart Catalogs include such sections as well.
The problem usually is just in finding a fine waterproof magenta pen...
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22-01-2014, 01:49
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#3
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Moderator
Join Date: May 2012
Location: At sea somewhere in the Pacific
Boat: Jeanneau Sun Fast 40.3
Posts: 6,380
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Re: Correcting Charts
Quote:
Originally Posted by Jammer Six
For all you guys who are navigators or officers, where did you learn to correct charts?
Technical school? Academy? Is there a class where they sit you down and say "This is a Local Notice To Mariners. This is a chart. To correct the chart, this is what you do."?
I just learned here that there's a difference between a discrepancy and a correction, and Bowditch says corrections should be made in pen.
So I'm wondering where those of you who are licensed pros learned to do this The Right Way.
I'd like to learn The Right Way, and short of joining the Navy, I'm willing to take a class if I have to.
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Actually, there is an easy way. Most notices to mariners these days include a picture of the corrected chart (just the affected portion) I simply print this out, cut to size and past (rubber cement) it on my chart in the exact position where it goes.
Simple and easy.
__________________
https://www.amazon.co.uk/s?k=carsten...ref=nb_sb_noss
Our books have gotten 5 star reviews on Amazon. Several readers have written "I never thought I would go on a circumnavigation, but when I read these books, I was right there in the cockpit with Vinni and Carsten"
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22-01-2014, 03:25
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#4
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Registered User
Join Date: Nov 2013
Location: Louisville, KY
Boat: Globe, cutter/ketch,38
Posts: 724
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Re: Correcting Charts
Join the USPS, (United States Power Squadron) Upon completion of their basic boating course you can join and they offer classes from Advance piloting through Navigator (Sextant navigation) and a whole host of other courses. http://www.usps.org More important is that unlike the Annapolis School on Seamanship, it's free other than course materials and time!
In Seatlle it is http://www.usps.org/seattle/index.htm
__________________
www.sailboatvigah.com Boats don't like being neglected, but then neither do significant others!
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22-01-2014, 03:32
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#5
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Registered User
Join Date: Apr 2007
Location: Australia
Boat: Farr37 - Southern Cross
Posts: 84
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Re: Correcting Charts
In the Aus navy, the Navigating Officer would not normally do the chart corrections himself. He had a Navigators Yeoman to do the donkey work - usually the Met observer.
Didn't look like a fun job. Ships maintained a vey comprehnsive folio of charts and they all needed to be kept up to date. Can recall arriving in port after a few weeks at sea and literally bags of mail with notices to mariners containg corrections. Would keep him busy for days and days until the next lot arrived.
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22-01-2014, 04:13
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#6
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Moderator Emeritus
Join Date: Oct 2009
Location: Manchester, UK
Boat: Beneteau 473
Posts: 5,591
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Re: Correcting Charts
In the UK Merchant Navy, chart correcting (and publications) are traditionally carried out by the 2n Mate ( a good reason to progress up through that rank as quickly as possible)
Chart correcting is normally learned while onboard ship, not much class room time is dedicated to the subject.
On well run merchant ships nowadays, chart correcting is a lot easier than it was in the past. Computer software keeps track of the chart folio's, and a corrections are sent electronically on a weekly basis, and the software will then print out the needed corrections on tracing paper. This is then overlaid on the chart and the correction made.
In the good old days, a bunch of weekly notices would arrive in the ships mail, maybe every 6 to 8 weeks, and then the painful progress of correcting would be done, using parallel rules, dividers and pen
An old edition of NP 294 can be found here
http://helptodeckofficers.weebly.com...correction.pdf
Not a brilliant copy, a few pages missing and its not in the correct page sequence, but it will give you some idea.
__________________
Nigel
Beneteau 473
Manchester, UK
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22-01-2014, 12:35
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#7
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Registered User
Join Date: Aug 2009
Location: White Stone, VA
Boat: Cabo Rico 38 / Bayfield 32
Posts: 624
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Re: Correcting Charts
Quote:
Originally Posted by bletso
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+1
I suppose it depends on the instructor, but I've gained a lot of knowledge and practical tips taking the USPS courses. So far I've taken the Piloting and Advanced Piloting courses. Plan to take more.
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23-01-2014, 07:32
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#8
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cruiser
Join Date: Dec 2012
Location: Seattle
Posts: 1,129
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Re: Correcting Charts
I've never seen a correction in a Local Notice to Mariners that could be cut and pasted to a chart. District 13, USCG.
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23-01-2014, 08:03
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#9
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Moderator
Join Date: May 2012
Location: At sea somewhere in the Pacific
Boat: Jeanneau Sun Fast 40.3
Posts: 6,380
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Re: Correcting Charts
Quote:
Originally Posted by Jammer Six
I've never seen a correction in a Local Notice to Mariners that could be cut and pasted to a chart. District 13, USCG.
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The Danish ones have them
__________________
https://www.amazon.co.uk/s?k=carsten...ref=nb_sb_noss
Our books have gotten 5 star reviews on Amazon. Several readers have written "I never thought I would go on a circumnavigation, but when I read these books, I was right there in the cockpit with Vinni and Carsten"
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17-02-2014, 19:04
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#10
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Senior Cruiser
Join Date: May 2013
Location: Oregon to Alaska
Boat: Wheeler Shipyard 83' ex USCG
Posts: 3,509
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Re: Correcting Charts
One of my first jobs was logging Notice to Mariners and correcting charts. Later I became a Navy trained navigator. You make the change look as if it was originally printed on the chart. Find the change somewhere else and draw or write in the change with proper colors. I like carstenb's post about copying the printed correction. When I first did corrections Notice to Mariners was all text. Now we have color printers.
Lepke
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17-02-2014, 21:55
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#11
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cruiser
Join Date: Dec 2012
Location: Seattle
Posts: 1,129
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Re: Correcting Charts
I've seen some of 13's LMNs printed as small "overlays", but I haven't seen anything in Puget Sound printed that way, nor have I seen any of the corrections printed that way.
All I've seen in a couple years is text descriptions, and callouts of which section of Chart Number One to use.
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17-02-2014, 23:16
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#12
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Moderator
Join Date: Nov 2011
Location: aboard, in Tasmania, Australia
Boat: Sayer 46' Solent rig sloop
Posts: 28,524
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Re: Correcting Charts
The magenta pen isn't the only challenge: the fine motor coordination for the super small print can be one, too.
A.
__________________
Who scorns the calm has forgotten the storm.
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17-02-2014, 23:18
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#13
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Nearly an old salt
Join Date: Jun 2009
Location: Lefkas Marina ,Greece
Boat: Bavaria 36
Posts: 22,801
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Re: Correcting Charts
Quote:
Originally Posted by Ann T. Cate
The magenta pen isn't the only challenge: the fine motor coordination for the super small print can be one, too.
A.
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Also many chart types aren't suitable for updating. ( like IMRAY )
Dave
__________________
Interested in smart boat technology, networking and all things tech
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17-02-2014, 23:35
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#14
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Moderator Emeritus
Join Date: Oct 2009
Location: Manchester, UK
Boat: Beneteau 473
Posts: 5,591
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Re: Correcting Charts
Quote:
Originally Posted by Ann T. Cate
The magenta pen isn't the only challenge: the fine motor coordination for the super small print can be one, too.
A.
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If you want neat, and have the cash to spare, there is always this bit of kit
Chart Correction Kit: Thomas Gunn: Online Shop: :
Its a set of fine stamps of just about every chart symbol
Occasionally have 2nd Mates asking me to purchase this for the ship, but I tell them if they use a really fine drawing pen, and stay sober, they dont need it.
__________________
Nigel
Beneteau 473
Manchester, UK
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17-02-2014, 23:58
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#15
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Moderator
Join Date: May 2008
Location: cruising SW Pacific
Boat: Jon Sayer 1-off 46 ft fract rig sloop strip plank in W Red Cedar
Posts: 21,184
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Re: Correcting Charts
Quote:
Originally Posted by nigel1
Occasionally have 2nd Mates asking me to purchase this for the ship, but I tell them if they use a really fine drawing pen, and stay sober, they dont need it.
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My Gawd... a hell ship for sure!
Cheers,
Jim
__________________
Jim and Ann s/v Insatiable II, lying Port Cygnet Tasmania once again.
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