Eldridge v. App question - SailNet Community
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post #1 of 10 Old 05-31-2013 Thread Starter
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Eldridge v. App question

We sail out of Groton, CT and have both an Eldridge book and the Buoy Data app. The tide data for both they are VERY different. For example, according to the Buoy Data app the max high tides today at the New London Harbor entrance are 6:53 a.m. and 7:28 p.m. When I look in Eldridge for Noank (which is within a few miles of the New London Harbor entrance), it says 2:05 before Bridgeport which equates to 2:56 a.m. and 3:33 p.m. That's obviously a huge difference.

People swear by Eldridge so I'm inclined to go with the book, but am I doing something wrong? Anyone sail in that area who can tell me what they use/which area they reference in Eldridge? Perhaps I should be using a different app?

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post #2 of 10 Old 05-31-2013
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Eldridge v. App question

Are you sure that the app isn't telling you the max ebb and flood currents? That occurs about mid tide, which looks about right by those times. If the Eldridge is wrong, that's big news....

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Re: Eldridge v. App question

My Eldridge is on the boat, where I'm headed in a few hours. My charts and tides app shows high tides in the area ranging give or take 4pm.


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Re: Eldridge v. App question

Looks to be around 3:30 to 4:00 to me.

http://tidesonline.noaa.gov/plotcomp...on,+CT+&flag=0


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Re: Eldridge v. App question

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Are you sure that the app isn't telling you the max ebb and flood currents? That occurs about mid tide, which looks about right by those times. If the Eldridge is wrong, that's big news....
Yes, the app is for max ebb. Eldridge says time of high water which I thought was the same. So is the Eldridge time when the high tide begins? That could be what my problem was.

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Eldridge v. App question

Yeah, max ebb is the point at which the tide is flowing out the fastest. When that app shows "slack before ebb", that's high tide.

The Eldridge "time of high water" is the moment just before the tide begins to go back out.
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Re: Eldridge v. App question

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Yeah, max ebb is the point at which the tide is flowing out the fastest. When that app shows "slack before ebb", that's high tide.

The Eldridge "time of high water" is the moment just before the tide begins to go back out.
Aha! Thank you. I figured I had to be doing something wrong given that everyone recommends Eldridge.

Thanks again.

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post #8 of 10 Old 05-31-2013
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Re: Eldridge v. App question

Remember that current and tide are not the same. The flood may still be running well after high tide. The ebb may still be running well after low tide.

Don't waste your time looking at tide tables unless you have a draft issue. Go straight to the current table.

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Re: Eldridge v. App question

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Originally Posted by marcusc130 View Post
....When that app shows "slack before ebb", that's high tide....
I'm betting high tide was 30 to 90 minutes earlier.


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post #10 of 10 Old 05-31-2013
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Re: Eldridge v. App question

In Eldridge, use the Race Current Tables and the charts that show the current direction and magnitude. There's one for each hour.
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