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Can someone tell me what to much of a tidal exchange is ? I mainly dive right before slack regardless of the exchange but have seen divers dive right in the middle of a 5 foot exchange will 5 feet make that much of a difference.
I guess that all depends on where you are diving and what you want your dive to look like. Anywhere around Tacoma it is probably wise to plan low exchange days and dive near the slack.
Anything over one knot of current is too much if you're not getting paid to dive.
Instead of looking at height of exchange, why not check out the predicted tidal current for the site? NOAA has the data here although I expect there are also commercial web sites that offer the information in more palatable form.
Once you get to the location you're interested in, click on the question mark button for an explanation of how to apply the location correction factors to the reference station's tidal data.
I guess that all depends on where you are diving and what you want your dive to look like. Anywhere around Tacoma it is probably wise to plan low exchange days and dive near the slack.
What he said.
If you want a real fun ride, try Titlow Park mid-exchange. :icosm13:
I can live with up to 4 knots (okay, maybe three ). Beyond that, it's a definite drift dive.
Last edited by DeepDog; February 11th, 2005 at 12:55 AM.
I like to pull out my knife and pull myself head into the oncoming current at that site. Makes for quite a work out if you can do it. Not something I would recomend for new divers, but once you get comfortable with doing that there really is no other non wet enjoyable work out.
If you want a real **n ride, try Titlow Park mid-exchange. :icosm13:
Or not ... that's fairly dangerous advice unless the max current is a knot or less ... or you are diving from a live boat that can follow where the current takes you.
Originally Posted by DeepDog
I can live with up to 4 knots (okay, maybe three ). Beyond that, it's a definite drift dive.
Anything over a knot is a drift dive. Very few people can manage swimming into even that much current for more than a few minutes. Most wouldn't last more than a minute or two.
At three knots, you will not be able to control anything other than your depth ... and even then you will be at the mercy of up/downwellings.
At four knots you would not even be able to hang onto a rock without risking the loss of mask, fins, and possibly yesterday's lunch ... :11:
Life is short. Break the rules, forgive quickly, kiss slowly, love deeply, laugh uncontrollably, and never regret anything that makes you smile.
Not everyone who reads SB is looking to learn how best to use their new snorkel. Some are here just hoping to get the chance to tell someone else exactly what they can do with their new snorkel. While others are trying to sell their old snorkel. (gypsyjim)
I've done Agate Pass with a 4 knot current at the beginning that went down to 2 knots at the wider mouth. At 4 knots you make no diagonal headway. At 2 knots you can. As far as swimming against it, 1 knot for a very short period of time is about all one can handle.
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Originally Posted by Uncle Pug
). Beyond that, it's a definite drift dive.
