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28-03-2013, 16:28
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#1
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Registered User
Join Date: Mar 2013
Location: Sweden
Posts: 8
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Question about Abbreviations on Nautical Chart
Hi
I have an antique route chart from 1895 for North Atlantic crossings, and on the chart are lots of four digit numbers with abbreviations under them. The abbreviations usually include "oz", such as "gl.oz", "oz.cl", "gy.oz", "br.oz" etc.
Here's a sample of the chart:
https://dl.dropbox.com/u/42312567/chart%20sample.jpg
Can anyone tell me what these abbreviations mean?
Thanks
Jason
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28-03-2013, 20:26
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#2
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Registered User
Join Date: Mar 2013
Location: Brisbane, Australia
Boat: Mariner 39
Posts: 2
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Re: Question about Abbreviations on a Nautical Chart
Have a look at this site...
mapserver.mytopo.com/mapserver/nautical_symbols/V2.html
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28-03-2013, 20:31
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#3
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Senior Cruiser
Join Date: Oct 2007
Location: 29° 49.16’ N 82° 25.82’ W
Boat: Pearson 422
Posts: 16,306
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Re: Question about Abbreviations on a Nautical Chart
My guess is they describe the bottom at that location.
oz ooze
so
br oz brown ooze
gy oz gray ooze
etc.
__________________
The water is always bluer on the other side of the ocean.
Sometimes it's necessary to state the obvious for the benefit of the oblivious.
Rust is the poor man's Loctite.
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28-03-2013, 21:44
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#4
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Moderator
Join Date: Oct 2008
Boat: Bestevaer 49
Posts: 16,151
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Re: Question about Abbreviations on a Nautical Chart
Quote:
Originally Posted by skipmac
My guess is they describe the bottom at that location.
oz ooze
so
br oz brown ooze
gy oz gray ooze
etc.
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Skipmac is correct.
The other note on the chart is gl oz. This is 'globigerinida ooze', made up of shells of plankton .
__________________
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Unveiling Bullseye strops for low friction rings
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28-03-2013, 23:00
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#5
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Registered User
Join Date: Feb 2012
Posts: 2,441
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Re: Question about Abbreviations on a Nautical Chart
So ... what anchor holds best in gl oz?
Does anybody make a "Globigerinida MaxiGrip"?
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28-03-2013, 23:12
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#6
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Registered User
Join Date: Aug 2010
Location: Arctic Ocean
Boat: Under construction 35' ketch (and +3 smaller)
Posts: 2,762
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Re: Question about Abbreviations on Nautical Chart
Dunno but might be something describing the sea floor.
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29-03-2013, 05:38
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#7
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Senior Cruiser
Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 49,513
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Re: Question about Abbreviations on a Nautical Chart
Greetings and welcome aboard the CF, Dreeemboat.
__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"
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29-03-2013, 05:40
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#8
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Registered User
Join Date: Dec 2009
Location: Perros-Guirec, France
Boat: Jeanneau Sunshine 36
Posts: 999
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Re: Question about Abbreviations on a Nautical Chart
Quote:
Originally Posted by Andrew Troup
So ... what anchor holds best in gl oz?
Does anybody make a "Globigerinida MaxiGrip"?
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Do you REALLY intend to anchor in 2000+ fathoms ???
PS Globigerina, not Globigerinida which is the class, as opposed to species...
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29-03-2013, 06:20
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#9
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Senior Cruiser
Join Date: Oct 2007
Location: 29° 49.16’ N 82° 25.82’ W
Boat: Pearson 422
Posts: 16,306
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Re: Question about Abbreviations on a Nautical Chart
Quote:
Originally Posted by Seaworthy Lass
Skipmac is correct.
The other note on the chart is gl oz. This is 'globigerinida ooze', made up of shells of plankton .
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Globigerinida ooze? Holy mackerel, never heard of such a thing. Now I have to go get my dictionary google the term to read up on it.
__________________
The water is always bluer on the other side of the ocean.
Sometimes it's necessary to state the obvious for the benefit of the oblivious.
Rust is the poor man's Loctite.
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29-03-2013, 07:36
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#10
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Registered User
Join Date: May 2006
Location: On board Sarah, currently lying in Jacksonville, FL
Boat: Pearson, 424, 42', Sarah
Posts: 674
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Re: Question about Abbreviations on a Nautical Chart
Who'd a thunk the Hydrographic office in 1895 would be interested in the nature of the seabed at 2000 fathoms (or even feet)? In the middle of the Gulf Stream no less. They must have had some really long lead lines.
John
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29-03-2013, 07:51
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#11
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Senior Cruiser
Join Date: Oct 2007
Location: 29° 49.16’ N 82° 25.82’ W
Boat: Pearson 422
Posts: 16,306
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Re: Question about Abbreviations on a Nautical Chart
Quote:
Originally Posted by jstevens
Who'd a thunk the Hydrographic office in 1895 would be interested in the nature of the seabed at 2000 fathoms (or even feet)? In the middle of the Gulf Stream no less. They must have had some really long lead lines.
John
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I always wondered myself what was of interest on the bottom at that depth 100 years ago. I think at least partly in case they wanted to lay a communications cable in the area.
I have read about how they measured the depth and yes a very long lead line, essentially very large reels of wire cables and a big weight. It would take quite a while to do a sounding. Going down wasn't so bad but reeling the cable back in took some time.
__________________
The water is always bluer on the other side of the ocean.
Sometimes it's necessary to state the obvious for the benefit of the oblivious.
Rust is the poor man's Loctite.
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29-03-2013, 12:16
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#12
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Registered User
Join Date: Mar 2013
Location: Sweden
Posts: 8
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Re: Question about Abbreviations on a Nautical Chart
Thanks guys.
I thought you guys were joking at first, when you explained these abbreviations - especially when I got to the 'globigerinida ooze'!!!
I would never have guessed this meaning!
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29-03-2013, 12:22
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#13
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Marine Service Provider
Join Date: Jan 2011
Location: St. Petersburg, FL
Boat: Retired Delivery Capt
Posts: 3,690
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Jason
The question begs to be asked.... Any idea what the "X" on the map marks???
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"Whenever...it requires a strong moral principle to prevent me from deliberately stepping into the street, and methodically knocking people's hats off- then, I account it high time to get to sea..." Ishmael
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29-03-2013, 12:41
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#14
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Registered User
Join Date: Mar 2013
Location: Sweden
Posts: 8
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Re: Question about Abbreviations on a Nautical Chart
Quote:
Originally Posted by Snore
Jason
The question begs to be asked.... Any idea what the "X" on the map marks???
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In cutting I provided it does look intriguing... but on the chart there's a whole line of these all the way to Ireland so I think they are legs, although as you can see they are actually to the north of the shipping route. There's also a series number 4s in boxes too. The red dots are lighthouses. Here's a bit more detail for those who are interested:
https://dl.dropbox.com/u/42312567/No...5%20detail.jpg
It's strange to think, looking at this map, that in 1895, the most sophisticated piece of equipment they had was the clockwork chronometer. The first Marconi installation wasn't until 5 or 6 years later. So when those large liners left Liverpool, and lost sight of land, there were completely alone for five days, with up to 2000 passengers. Navigation was strictly by sun and stars, and when it was cloudy they used dead reckoning, and the engineer would send the captain regular reports of engines' revolutions, which were used to help determine the distance travelled.
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30-03-2013, 05:06
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#15
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Registered User
Join Date: Mar 2013
Location: Sweden
Posts: 8
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Re: Question about Abbreviations on a Nautical Chart
I found out from a historical forum just now that the interest in "ooze" was that nature of the seabed could be used to help a ship's crew determine the position, for example in fog, back in those days, especially if they were heading into an estuary.
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