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Diving Rhone on a slack tide #210282
12/01/2019 07:51 PM
12/01/2019 07:51 PM
Joined: Nov 2019
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chbrow10 Offline OP
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chbrow10  Offline OP
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My memory serves that you need to dive the Rhone on a slack tide. Does anyone know where I can find a tide table for January 2020? I recall that there was one tide listed for the whole of the BVI, correct?

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Re: Diving Rhone on a slack tide [Re: chbrow10] #210335
12/02/2019 11:38 AM
12/02/2019 11:38 AM
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Middleburg, VA
cwoody Offline
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I remember some pretty good current getting from the dive boat to the wreck. Was not an issue once we were at/in the wreck.

Stay close to bottom when heading into the current to cut down on current affect. We were practically crawling along the bottom.

Only see one tide listed for entire BVI.

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Re: Diving Rhone on a slack tide [Re: chbrow10] #210353
12/02/2019 02:01 PM
12/02/2019 02:01 PM
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Zanshin Offline
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I don't think you are going to notice much of a difference with the tides at the Rhône. But in any case there's only the one tide chart for the BVI and no adjustment points; the currents are low and visibility is barely affected.

Re: Diving Rhone on a slack tide [Re: chbrow10] #210399
12/03/2019 08:11 AM
12/03/2019 08:11 AM
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Kegoangoango Online content
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I tried to dive the Rhone last year in Dec. The captain of the dive boat dropped the emergency regulator into the water with the normal 2# weight and the regulator never got below 3'-5' from the surface. He estimated it was moving between 6-9knots. I don't know how to estimate from that event, but it was moving pretty quickly and we were unable to dive.

Re: Diving Rhone on a slack tide [Re: chbrow10] #210403
12/03/2019 08:47 AM
12/03/2019 08:47 AM
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GeorgeC1 Offline
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You do get current st the Rhône. I am not sure if it is driven by tides since it seems random. I have gone under in slack water to have a very strong current on return to the boat. I will start watching the tides and see if there is any correlation. Only once was it to strong to dive.
G

Re: Diving Rhone on a slack tide [Re: chbrow10] #210407
12/03/2019 09:19 AM
12/03/2019 09:19 AM
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Posts: 263
Redmond, WA
MrEZgoin Offline
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6-9 knots lol

Re: Diving Rhone on a slack tide [Re: chbrow10] #210439
12/03/2019 01:02 PM
12/03/2019 01:02 PM
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Zanshin Offline
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I've dived the Rhone 10+ times (one of the advantages of having my own compressor aboard) and never noticed a current or the state of the tide. I think that the divemaster in Kegoangoango's post might have been overestimating the water speed, a human with fins swims at about 2 knots and 6 knots of current would 3 times faster than a person can swim. While a river might get up to those speeds, the currents around the BVI don't. At 6 knots the Rhône itself might have moved smile And the water would have looked like soup.

Re: Diving Rhone on a slack tide [Re: Zanshin] #210446
12/03/2019 03:00 PM
12/03/2019 03:00 PM
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Posts: 2,634
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sail445 Offline
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A few times each year there are currents depending on the seas,winds and tides where there are rip currents over six knots not only by Salt island but throughout the islands

Re: Diving Rhone on a slack tide [Re: chbrow10] #210480
12/04/2019 02:21 AM
12/04/2019 02:21 AM
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Zanshin Offline
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Sail445 - that is an interesting comment. Apart from during a hurricane, when and where would this be? A quick search of the internet hasn't shown anything and "rip currents" usually get formed by the shape of the underwater surfaces and are regular and don't just pop up anywhere.

Re: Diving Rhone on a slack tide [Re: chbrow10] #210490
12/04/2019 09:24 AM
12/04/2019 09:24 AM
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As I said, I can't really judge the current speed based on the regulator not sinking. I only reported what the captain said. I will add that no other dive or snorkel boats dove the Rhone that morning. So it must have been a fast enough current to scare everyone off. All the dive boats went to other locations in the area.

Re: Diving Rhone on a slack tide [Re: Zanshin] #210492
12/04/2019 09:28 AM
12/04/2019 09:28 AM
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sail445 Offline
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It happens whenever you have a bad storm in the Atlantic usually with N seas and heavy S to E wind generated seas colliding with the North seas which cause swift confused currents through the passages between islands.

Re: Diving Rhone on a slack tide [Re: chbrow10] #210545
12/04/2019 07:33 PM
12/04/2019 07:33 PM
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Redmond, WA
MrEZgoin Offline
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Sorry I just got a kick out of imagining the skipper approaching the mooring buoy (which has it's own foamy wake) in forward gear at 1800 rpm or so, then dropping a regulator to see if there's too much current to dive. :-)

Re: Diving Rhone on a slack tide [Re: MrEZgoin] #210549
12/04/2019 08:08 PM
12/04/2019 08:08 PM
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sail445 Offline
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Approaching a mooring at 1800 rpms ?? Hello

Re: Diving Rhone on a slack tide [Re: sail445] #210553
12/04/2019 09:57 PM
12/04/2019 09:57 PM
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Redmond, WA
MrEZgoin Offline
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Originally Posted by sail445
Approaching a mooring at 1800 rpms ?? Hello


Well, yeah, if you want to keep up with the buoy in 6 to 9 knots of current. Did you read the whole thread?

Re: Diving Rhone on a slack tide [Re: chbrow10] #210616
12/05/2019 03:14 PM
12/05/2019 03:14 PM
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Breeze Offline
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Currents and tides are not the same things, although marine and estuarine underwater topography may marry the 2 in a difficult matrimony.

In northern New England, our diurnal tidal difference is 11-18 feet of water. Each tide, in total , roughly 12 hrs. That is from fully high, through low, back to full high. Slack tide is roughly 20 minutes ( more or less depending on where you actually are). Scallop and urchin divers seem to get their quotas every day they are allowed, and their quotas take a heckuva lot longer than 40-60 minutes out of 12 hours.

BVI tide table ( one tide daily) for today indicates that low tide was at 8:23 this morning, High tide will be at 11pm this evening, and the tidal difference is about .14 m, which is less than 6 inches over @15.5 hours.

I think my idea of slack tide is far far different than when referring to the BVI tides.

Re: Diving Rhone on a slack tide [Re: Breeze] #210623
12/05/2019 06:41 PM
12/05/2019 06:41 PM
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sail445 Offline
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So what is your point?
Everyone understands the difference between currents and tides,tides and wind generated seas.

Re: Diving Rhone on a slack tide [Re: chbrow10] #210633
12/05/2019 09:16 PM
12/05/2019 09:16 PM
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Breeze Offline
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Breeze  Offline
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Well obviously, Sail445, NOT everyone has the same understanding of slack tide. If you use your eyes, you can see the title of this thread.


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