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Old 18-11-2021, 14:14   #16
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Re: ICW southbound in FL FYI

Bigger issue we experienced was that on several bridges the wires to the light were not taught or attached along the span but hanging in loop much lower than height listed. Very easy to catch mast head instruments. Hit the vhf antenna a few times. Impossible to steer around until you are too close to do anything about.
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Old 19-11-2021, 20:29   #17
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Re: ICW southbound in FL FYI

If you lay down on the floor of the dinghy you can use a golf range finder to determine the bridge clearance. Send the dinghy ahead and you should be fine.
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Old 26-11-2021, 08:21   #18
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Re: ICW southbound in FL FYI

Why worry about it? Another week of climate change and you can float over those bridges. How do climate change whiners explain the ice ages? And the ultimate rewarming afterward?
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Old 26-11-2021, 10:26   #19
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Re: ICW southbound in FL FYI

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Why worry about it? Another week of climate change and you can float over those bridges. How do climate change whiners explain the ice ages? And the ultimate rewarming afterward?
I recommend no substantive responses to the anthropogenic climate change deniers. It's just trolling. They are either willfully ignorant or just trying to rile people up. Deny them the oxygen they need and they will sink back down into the swamp.
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Old 26-11-2021, 10:49   #20
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Re: ICW southbound in FL FYI

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Rising water levels ... it is called a Climate Crisis!
Not true. There is no crisis. Climate related deaths have declined by over 98% in the last 100 years. Sea level measurement is very difficult because of so many variables. That’s why there’s no consensus among scientists. Steven Koonin, Obama’s climate scientist, just published a book called “Unsttled..” where he spent the time and effort to actually read the actual climate studies that have been accumulated by the UN’s IPCC for decades (vs. the biased “recaps” published by activists, journalists and politicians). He claims that the studies conclude very mild warming (only 1.5 deg C) in the last 100 years and mild sea level rise. The science is unsettled but the actual consensus so far is that the “computer model climate catastrophe predictions” have all been wrong so far. He doesn’t believe the latest predictions bantered about in the recent COP26. King tides, winds, local temperatures affect local sea levels.
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Old 26-11-2021, 11:16   #21
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Re: ICW southbound in FL FYI

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Originally Posted by rsementi View Post
Not true. There is no crisis.



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King tides, winds, local temperatures affect local sea levels.

I'm sure the polar bears looking for ice north of Alaska and Canada must agree with this.
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Old 26-11-2021, 11:38   #22
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Re: ICW southbound in FL FYI

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I'm sure the polar bears looking for ice north of Alaska and Canada must agree with this.
The polar bear situation is the most disputed. Based on my research, the total world polar bear population is increasing and decreasing depending upon where you look.
But based on the so many debunked catastrophes by Steven Koonin, I don’t believe that the polar bears are a victim of climate change since it is a fact that our climate is barely changing.
Remember, most all climate alarmists hate capitalism and love socialism.
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Old 26-11-2021, 11:44   #23
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Re: ICW southbound in FL FYI

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Yep ... get with the programme ... water levels are rising all over the world ... sorry you missed it! But you will be even more sorry when it hits you.
Climate and weather extremes ... ask the people in British Columbia right about now. Ask the people in Washington State about floods ... and oh and I nearly forgot ... don't mention forest fires!
You want to experience tides? Try north coast of France and North East Canadian shores!
Sorry, just realized you are in the US!
NOAA says that in the 100 years 1919-2019 Sea Levels along the east coast of USA have risen exactly 5 3/4 inches. 18000 years ago sea levels were 185ft below now and have been rising kind of continuously since. However in the past 10 years sea levels have not rose any.
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Old 26-11-2021, 18:03   #24
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Re: ICW southbound in FL FYI

This whole thread reminds me of the Gilligan's Island episode where the professor was thinking the island was sinking. Long live Ginger!
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Old 26-11-2021, 18:39   #25
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Re: ICW southbound in FL FYI

Go to https://tidesandcurrents.noaa.gov/ma...tml?id=8721604 .
Click "Plot Data".

...and you'll see the water has been a little high lately.

The site is handy for those times when the actual (rather than predicted) water level matters.
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Old 27-11-2021, 06:14   #26
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Re: ICW southbound in FL FYI

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Did you drop a tape from the bridge to the water surface? Or just read the boards on the fenders? And did you know that some of the marker boards indicate vertical clearance at the fenders, not at the center of the span?
Yes - all of them.

Those are (supposed to be) minimum heights within the fenders...
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Old 27-11-2021, 06:57   #27
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Re: ICW southbound in FL FYI

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Originally Posted by Scrimshaw4 View Post
If you lay down on the floor of the dinghy you can use a golf range finder to determine the bridge clearance. Send the dinghy ahead and you should be fine.
How accurate are these? +/- a couple of inches at 60-65' range or?
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Old 27-11-2021, 07:45   #28
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Re: ICW southbound in FL FYI

Your local golf pro or sniper store can probably answer the question of range finder accuracy. Like most things the higher priced models are probably the best.
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Old 27-11-2021, 08:26   #29
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Re: ICW southbound in FL FYI

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How accurate are these? +/- a couple of inches at 60-65' range or?
I've used a Leupold model extensively, it's stated accuracy was 0.5%, so I'd expect it to be +/- 4 inches on a 65 foot bridge. (You'd need to know your exact height of eye of course, and do a little math to convert slant range to height unless you were directly beneath.)
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Old 27-11-2021, 08:46   #30
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Re: ICW southbound in FL FYI

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I've used a Leupold model extensively, it's stated accuracy was 0.5%, so I'd expect it to be +/- 4 inches on a 65 foot bridge. (You'd need to know your exact height of eye of course, and do a little math to convert slant range to height unless you were directly beneath.)
Thanks. I think +/- 4" would serve. I doubt the height boards on the bridges are that accurate.
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