Warning about cruising the ICW - SailNet Community
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post #1 of 23 Old 11-15-2013 Thread Starter
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Warning about cruising the ICW

The magenta line on charts not the authority for navigation. Yesterday a boat was hard aground when the captain chose to follow the magenta line rather than honour the markers.

Always honour the markers and buoys.

A prudent navigator should peruse the intended track to determine if there are any problem areas beforehand as there are some glaring errors in the indicated route. For example ICW marker 58A and buoy 60 in St. Augustine the magenta line takes you over a shoal.
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post #2 of 23 Old 11-15-2013
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Re: Warning about cruising the ICW

Lots of places like that on the icw. Today we went on the "wrong" side of a green can as charted. In the real world outside of our chartplotter we passed well to the correct side of that can.
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post #3 of 23 Old 11-15-2013
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Re: Warning about cruising the ICW

It is like that not only on the ICW but everywhere, not only because buoys and channels are actualized more frequently but because not always the chart coincides with the GPS. GPS is very accurate, maps, that many times are yet based on old charts are not always correct regarding GPS position.

Those that have already navigated with their boats over land (at least on the plotter chart) will understand perfectly what I am talking about
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Re: Warning about cruising the ICW

So you are saying a prudent navigator should actually use the aids to navigation and not rely on a graphic animation to choose their course!?
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post #5 of 23 Old 11-15-2013
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Re: Warning about cruising the ICW

So everyone agrees the magenta line should not be trusted. Let me suggest that the marks are not infallible either. If we had rounded the marks in the following photos as we should have .........

Sorry guys , had several photos to illustrate the folly of blindly following marks but get a message saying "Internal Aerver Errpr" that won't let me upload.

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post #6 of 23 Old 11-16-2013
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Re: Warning about cruising the ICW

More information on this subject is available at: "aloha magenta line"--for ICW cruisers may be of interest..

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post #7 of 23 Old 11-16-2013
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Re: Warning about cruising the ICW

Clearly, visual reckoning and charts are mandatory.

That said, with all the cruisers that transit the ICW every year, one would think there would be a way to chart it properly. Google has a pic of everyone's house for goodness sake. Put one of those things on top of the next clorox bottle to run the thing.


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post #8 of 23 Old 11-16-2013
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Re: Warning about cruising the ICW

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Originally Posted by Minnewaska View Post
Clearly, visual reckoning and charts are mandatory.

That said, with all the cruisers that transit the ICW every year, one would think there would be a way to chart it properly. Google has a pic of everyone's house for goodness sake. Put one of those things on top of the next clorox bottle to run the thing.
the problem is that the whole thing is sand and it moves, sometimes dramatically within a few days. On our 2005 trip we had 2002 charts that were useless between Atlantic City and Manesquan but our 1971 charts were bang on.

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post #9 of 23 Old 11-16-2013
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Re: Warning about cruising the ICW

First of all, there is a great source of info at Salty Southeast Cruisers. Second, your eyes and your depth sounder are your friends.
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post #10 of 23 Old 11-16-2013
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Re: Warning about cruising the ICW

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the problem is that the whole thing is sand and it moves, sometimes dramatically within a few days. On our 2005 trip we had 2002 charts that were useless between Atlantic City and Manesquan but our 1971 charts were bang on.
These are my home waters and the channels and shoals tend to migrate. I never assume the charts are correct and I don't assume I can follow a previous route that I call up from the plotters memory unless it's very recent. These are shallow waters so I always have one eye on my depth. Probably a good strategy wherever you sail.

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