Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 10-10-2016, 03:08   #1
Registered User
 
Franziska's Avatar

Join Date: Mar 2011
Location: Harlingen, The Netherlands
Boat: Woods Mira 35 Catamaran
Posts: 480
Has anyone Southamerica Current Data for OpenCpn?

Hi,

a friend of mine is in Southamerica and needs data on currents.

In Europa I used the otcurrent plugin which was great, but I can not see where to get the relevant data for Southamerica (Mar del Plata).

Same applies for tidal data on the Southamerican Westcoast .

Anyone has a source for that?

Alternatively a free current Grib source covering that area?

Thanks so much,

Franziska


Welcome to the Woods Mira 35 - Catamaran Lady Rovers Website!
__________________

Franziska is offline   Reply With Quote
Old 10-10-2016, 06:13   #2
Registered User
 
Franziska's Avatar

Join Date: Mar 2011
Location: Harlingen, The Netherlands
Boat: Woods Mira 35 Catamaran
Posts: 480
Re: Has anyone Southamerica Current Data for OpenCpn?

No-one? Maybe someone Spanish speaking?

www.ladyrover.com
__________________

Franziska is offline   Reply With Quote
Old 10-10-2016, 09:01   #3
Registered User
 
Franziska's Avatar

Join Date: Mar 2011
Location: Harlingen, The Netherlands
Boat: Woods Mira 35 Catamaran
Posts: 480
Re: Has anyone Southamerica Current Data for OpenCpn?

Anyone with connections to South America maybe?
Franziska is offline   Reply With Quote
Old 10-10-2016, 09:45   #4
Senior Cruiser

Cruisers Forum Supporter

Join Date: Aug 2009
Location: between the devil and the deep blue sea
Boat: a sailing boat
Posts: 15,391
Re: Has anyone Southamerica Current Data for OpenCpn?

I can't help, but you can help me.

Where do you get currents grib data for other regions?

N Atlantic perhaps?

THX in advance,
b.
__________________
barnakiel is offline   Reply With Quote
Old 10-10-2016, 11:13   #5
Registered User
 
Franziska's Avatar

Join Date: Mar 2011
Location: Harlingen, The Netherlands
Boat: Woods Mira 35 Catamaran
Posts: 480
Re: Has anyone Southamerica Current Data for OpenCpn?

Hi Barny,

here is what I found today:

Offshore (did not try it though):
http://www.svsarana.com/oscar/

Europe:
http://www.bsh.de/aktdat/modell/stro...ngspaketee.htm

Other:
http://www.globalmarinenet.com/free-...ile-downloads/

The OTcurrents uses tidal diamond data / harmonics data which I believe seems only available in Europe and US.

Still looking for the channels in South America though...

Hope that helps.
Franziska is offline   Reply With Quote
Old 10-10-2016, 13:01   #6
Senior Cruiser

Cruisers Forum Supporter

Join Date: Aug 2009
Location: between the devil and the deep blue sea
Boat: a sailing boat
Posts: 15,391
Re: Has anyone Southamerica Current Data for OpenCpn?

Thank you very much!

Last time I looked up gmn there was no currents data there just wind and waves. I will check everything later what I can get from oscar. I think oscar could be availble directly without going thru sarna homesite.

I am attaching a sceen dump from Maree dans le Monde. This one apparently provides tidal data (tides, in my case, but read on) for the area you want. Alas: I am using a most outdated ver 4.0. Maybe your friend can simply email the people and ask if a new version shows tidal currents? (there is tidal currents entry in the top menu there ...)

Hope this pushes things somewhat forward.

Once again, thanks for your links!

Love,
b.
Attached Thumbnails
Click image for larger version

Name:	t.jpg
Views:	23
Size:	249.6 KB
ID:	132658  
__________________
barnakiel is offline   Reply With Quote
Old 10-10-2016, 13:08   #7
Senior Cruiser

Cruisers Forum Supporter

Join Date: Aug 2009
Location: between the devil and the deep blue sea
Boat: a sailing boat
Posts: 15,391
Re: Has anyone Southamerica Current Data for OpenCpn?

BTW once you know the tide, you are getting a good shot at the currents - the tidal current nearly always flows towards the crest of the tidal wave and its speed is related to the springs/neaps timing. It also flows relatively fastest (in one cycle) between the tides.

This is a rule fair enough for all general work along the coasts, etc. but not enough in fjords and wherever tide patterns are more complex (e.g. Australia Torres Strait area, etc.)

Cheers,
b.
__________________
barnakiel is offline   Reply With Quote
Old 10-10-2016, 13:14   #8
Registered User
 
El Pinguino's Avatar

Join Date: Aug 2013
Location: el campo
Boat: 39' Westerly Sealord
Posts: 3,182
Re: Has anyone Southamerica Current Data for OpenCpn?

This may point you in the right direction.. Tablas de mareas 2016 de Chile para la pesca
El Pinguino is online now   Reply With Quote
Old 10-10-2016, 13:16   #9
Registered User

Join Date: Apr 2016
Location: Porto Alegre
Boat: Nestor Volker 38' custom cold molded epoxy sloop
Posts: 40
Re: Has anyone Southamerica Current Data for OpenCpn?

Hi Franciska!
Here in Brazil I dont know any information about currents...
I'll ask at our sailing club but cant promisse
Regards
Carlo
__________________
carlo de leo is offline   Reply With Quote
Old 10-10-2016, 13:30   #10
Registered User
 
Franziska's Avatar

Join Date: Mar 2011
Location: Harlingen, The Netherlands
Boat: Woods Mira 35 Catamaran
Posts: 480
Re: Has anyone Southamerica Current Data for OpenCpn?

Thanks guys, forwarded it down South.
Btw B. I could not find a newer version of Marrée dans la monde than V4.0.

www.ladyrover.com
Franziska is offline   Reply With Quote
Old 10-10-2016, 13:45   #11
Registered User

Join Date: Aug 2014
Location: Aboard, presently in the Indian Ocean
Boat: Trisbal 36
Posts: 85
Re: Has anyone Southamerica Current Data for OpenCpn?

Hi Franziska,

Just need a bit of clarification before I can provide more of an answer.
Can you say whether you are looking for data on oceanic currents or tidal streams (or both)?
And for which area? I saw you mentioned Mar del Plata, but then you talked about the channels...

Having sailed around the bottom, here's a summary of my experience.

Concerning oceanic currents, in addition to the sources already mentioned, I would add Navimail: send the following content to navimail@meteo.fr (subject line does not matter, and adjusting the area is done with the Z line):
@mto@reqt@grib@
A 1
Z -60.000 -50.000 40.000 30.000
M 0.5
D 10
P courant tprof
G 24 48 72 96 120 144 168
C bzip2
s 2.1.3
@mto@reqt@fin@

For tidal streams, data is pretty patchy and I doubt you'll find an electronic tool (although I would love to be contradicted). Tidal streams will have to be computed from tidal heights and times. Various tools such as Marées dans le Monde generally work OK, but probably best to download official tidal tables. If I remember correctly, they should be available freely on Argentinian and Chilean hydro offices websites, but I may be mistaken.

From Mar del Plata to Lemaire Strait, that is pretty essential, given the large tidal range and corresponding currents. These will be strong mostly in rivers and estuaries and are then timed in sync with the tides. Another place where looking out is necessary is around Caleta Horno. Lots of current between the mainland and the island east of the caleta. As for the Lemaire Strait, even when calculating the tides, it can be a lottery... Essential to pick "manageable weather".

Once in the channels, things get very much softer, because the tidal range drops significantly. However, if I remember correctly, there are not many tidal prediction points on the Chilean side before you reach the area of Chiloé (big tides and currents there). For most places south, tides are almost unimportant, but in places where there are narrows, it can be wise to time your passage accordingly. Especially important in both narrow channels leading to Puerto Natales area... The catch is to use the "E del P" data given on most chilean charts. This is the offset between the moon crossing the meridian and the high tide. In most cases it works fine and you'll have a decent approximation of the timing, and any official prediction likely wouldn't fare better given the complexity of the channels in the area as well as other factors coming into play, such as wind force and direction, atmospheric pressure as well as rainfall and glacier calving.

I hope this can help your friend, and I hope they actually have fun calculating all this, because it's part of the game! Plug and play nav data down there would be too easy... (they will likely also discover the offset charts, navigating in all white areas, with no hydrographic data in places, and guessing their way into glacier moraines!)





Sent from my iPad using Cruisers Sailing Forum
__________________
belle-isle is offline   Reply With Quote
Old 10-10-2016, 13:49   #12
Registered User
 
Franziska's Avatar

Join Date: Mar 2011
Location: Harlingen, The Netherlands
Boat: Woods Mira 35 Catamaran
Posts: 480
Re: Has anyone Southamerica Current Data for OpenCpn?

Hey, great information.
Not sure, guess it's mostly tidal currents.
I sent them a link to this thread so they can pick the right info here.

Btw. your profile name is nice, was there few days ago.
Today in Pornichet at anchor.

Many thanks!

www.ladyrover.com
Franziska is offline   Reply With Quote
Old 10-10-2016, 14:22   #13
Registered User

Join Date: Aug 2014
Location: Aboard, presently in the Indian Ocean
Boat: Trisbal 36
Posts: 85
Re: Has anyone Southamerica Current Data for OpenCpn?

Quote:
Originally Posted by Franziska View Post
Hey, great information.
Not sure, guess it's mostly tidal currents.
I sent them a link to this thread so they can pick the right info here.

Btw. your profile name is nice, was there few days ago.
Today in Pornichet at anchor.

Many thanks!

www.ladyrover.com

Thanks for the comment about Belle-Isle. My home base is La Trinité, so it's my backyard...

Coming back to Patagonia, I wrote a page about it on our blog. http://journal.belle-isle.eu/2011/06...ere-grand-sud/ . It talks about the tides among other things. If your friends don't read French, they can always Google Translate it. And if they need to, they can also PM me. Things may hav changed since we sailed down there, though, so I always welcome comments, corrections and suggestions on how to make it better and more accurate.

Cheers


Sent from my iPad using Cruisers Sailing Forum
__________________
belle-isle is offline   Reply With Quote
Old 10-10-2016, 14:41   #14
Registered User
 
Franziska's Avatar

Join Date: Mar 2011
Location: Harlingen, The Netherlands
Boat: Woods Mira 35 Catamaran
Posts: 480
Re: Has anyone Southamerica Current Data for OpenCpn?

La Trinité is well, lovely town, I was there yesterday.

www.ladyrover.com
Franziska is offline   Reply With Quote
Old 10-10-2016, 14:54   #15
Registered User

Join Date: Aug 2014
Location: Aboard, presently in the Indian Ocean
Boat: Trisbal 36
Posts: 85
Re: Has anyone Southamerica Current Data for OpenCpn?

Quote:
Originally Posted by Franziska View Post
La Trinité is well, lovely town, I was there yesterday.

www.ladyrover.com

Another year until we sail up the river there and complete our circumnav...


Sent from my iPad using Cruisers Sailing Forum
__________________

__________________
belle-isle is offline   Reply With Quote
Reply

Tags
current, enc, opencpn

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
SE Asia to Southamerica Natura Sailor Logs & Cruising Plans 2 22-05-2016 06:23
UK tide & current data for NN3D MFDs? svfinnishline Marine Electronics 0 15-04-2015 17:03
Global Weather and Current Data dennisail Weather | Gear, Reports and Resources 7 21-08-2011 11:58
Maxsea Tidal & Current Data Thefisher Navigation 0 13-02-2010 16:13
Has Anyone Here Used the Magnalux 360 Chart/Data Plotter with Submission Entry Codes? xxuxx Navigation 0 26-12-2009 08:00


Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 17:05.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.