I will attempt to attach a photo I took of my Raymarine chartplotter yesterday when it displayed a symbol that I do not understand. (It's the symbol directly ahead of my boat.)It looks like the dorsal fin of a shark. Maybe there are sharks in the Tennessee River??!!
What is this symbol on my chart?
- Thread starter agaliha
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Go to the NOAA ENC website and download chart #1 ... should have the symbols that you are looking for.
I 'think'/guess it represents a 'standing wave' caused by bottom contour irregularities.
http://nauticalcharts.noaa.gov/mcd/enc/index.htm
I 'think'/guess it represents a 'standing wave' caused by bottom contour irregularities.
http://nauticalcharts.noaa.gov/mcd/enc/index.htm
Check your GPS settings
because some models, like my Garmin, allow you to switch between the manufacturer's symbols and the NOAA symbols.
If you don't find your SHARK!!! on the Chart #1 symbols, then look it up on Raymarine's own symbols. Check your chartplotter manual.
Compare it to your paper charts, which you have, right???
Was it MOVIN'????
Surprising that someone would need to suggest looking at Chart #1 - should be on board and be the first reference source for anything related to charts, and is published in Dutton's, Chapman's and free online. Just naggin'....
because some models, like my Garmin, allow you to switch between the manufacturer's symbols and the NOAA symbols.
If you don't find your SHARK!!! on the Chart #1 symbols, then look it up on Raymarine's own symbols. Check your chartplotter manual.
Compare it to your paper charts, which you have, right???
Was it MOVIN'????
Surprising that someone would need to suggest looking at Chart #1 - should be on board and be the first reference source for anything related to charts, and is published in Dutton's, Chapman's and free online. Just naggin'....
Looks more like a segment of a "track" from previous use, turned on then off or an initialization where it thought it was wandering around for a minute before getting a good fix.
The manual, page 35 for a cp89 and another ?
says
NAV AIDS PRESENTATION Allows the Nav Aids presentation to be drawn using NOAA symbology when US is selected or International symbols will be used when International is selected. When selected these functions affect how the icons for Lights, Signals, Buoys and beacons are displayed.
Also, Raymarine says this:
12.0.1 Additional Functions on Chart page When on the Chart page you will notice icons of Buoys, Towers, Lights, Wrecks, Tide Stations and Port Icons. If the cursor is moved over the top of these icons a popup window will be shown with information about the icon.
I don't own one of these units, but there seems to be a lot f finfo about them, right on them.
Hmm, still wonder, just what was that symbol?
says
NAV AIDS PRESENTATION Allows the Nav Aids presentation to be drawn using NOAA symbology when US is selected or International symbols will be used when International is selected. When selected these functions affect how the icons for Lights, Signals, Buoys and beacons are displayed.
Also, Raymarine says this:
12.0.1 Additional Functions on Chart page When on the Chart page you will notice icons of Buoys, Towers, Lights, Wrecks, Tide Stations and Port Icons. If the cursor is moved over the top of these icons a popup window will be shown with information about the icon.
I don't own one of these units, but there seems to be a lot f finfo about them, right on them.
Hmm, still wonder, just what was that symbol?
Sorry, guys...tried all that.
I have researched all the sources listed so far. NOAA, called Raymarine, did a web search. This symbol does not show up on any of those lists. Raymarine has no idea what it is. It's not part of a previous track, since I have loaded no tracks. I think maybe the shark theory might be the best one!
I have researched all the sources listed so far. NOAA, called Raymarine, did a web search. This symbol does not show up on any of those lists. Raymarine has no idea what it is. It's not part of a previous track, since I have loaded no tracks. I think maybe the shark theory might be the best one!
Ahhh, then al I can suggest
is to get all of us together and we'll GO BACK THERE with you! I'll bring the beer.
is to get all of us together and we'll GO BACK THERE with you! I'll bring the beer.
Might not be a symbol at all, might be a charted snag. Does the appearance of the thing change at different zoom levels? Have you compared the display to a paper chart version of the area?
Good Luck!
Tim Brogan
April IV C350 #68
Seattle
Good Luck!
Tim Brogan
April IV C350 #68
Seattle
It is a warning marker
that indicates a place where large waves can be encountered when large shipping goes by. The bottom shallows up in the right place and you DO NOT want to be there when there is shipping traffic transiting the area.
We have a couple of these in the Chesapeake Bay. 14' waves from nothing but the barge going by.
The symbol is meant to look like a breaking wave. If you turn on depth you will see why.
that indicates a place where large waves can be encountered when large shipping goes by. The bottom shallows up in the right place and you DO NOT want to be there when there is shipping traffic transiting the area.
We have a couple of these in the Chesapeake Bay. 14' waves from nothing but the barge going by.
The symbol is meant to look like a breaking wave. If you turn on depth you will see why.
This is hilarious!!
"when large shipping goes by" on the Tennessee River??!! Huck Finn look out!!
Maybe it's the Loch Ness Monster symbol.
"when large shipping goes by" on the Tennessee River??!! Huck Finn look out!!
Maybe it's the Loch Ness Monster symbol.
Huck went down the Mississippi (with Jim not GPS). But I am curious. I put the lat/lon into www.activecaptain.com and it shows you fighting the waves caused by a wakeboard boat in Chickamauga! Haven't sailed on Chicka since '75ish-is there barge traffic up there?
Where Did You Find That?
I even looked all through here:
http://www.iho.shom.fr/publicat/free/files/M4_v3.005_2008.pdf
I even looked all through here:
http://www.iho.shom.fr/publicat/free/files/M4_v3.005_2008.pdf
You are all wrong. I have been to that exact spot on the map. If you go there,you will see a guy kayaking.
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