Tide Graphs on East Coast USA
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  1. #1
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    Tide Graphs on East Coast USA

    Hyped up on high octane coffee and ADHD in overdrive, thought I would check the moon tide watches as it's beautiful outside right now. Seems like everyone is on point except the one, which by name would think the best, is a tad off. All set to 74°W longitude.


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    Member Time4Playnow's Avatar
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    Re: Tide Graphs on East Coast USA

    So those set the tides by Lat/Long?

    My tide graph watches (Frogs, Gulfmasters GWN-1000, and Protreks) all set the tide graph according to High Tide time. (the first one of the day) However, the ones that have sunrise/sunset (PRW-7000, and Rangeman) set that from Lat/Long.

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    Re: Tide Graphs on East Coast USA

    There are apparently two ways Casio does it. One is to set it lat/long and adjust with a lunatidal interval. The other method you select the time zone, and it can be adjusted a few hours (which sounds like just setting it to a different time zone.)

    If I understand it correctly you can get a tidal algorithm for a specific beach - Rip Curl apparently has a model that covers a lot in Australia. Those models which do that are much more accurate. Because of the information used, they have a limited number of beaches offered.

    On the other hand it's often a matter of the tide changing just a foot or so - navigational issues aren't supercritical. It's a matter of surfing, fishing, beachcombing, etc. Bay of Fundy critical tide issues are something else.

    One phenomenon I've looked into is a closed bay with relatively small navigation channel - it was the grail for open sea users who needed safe harbor, but on the other hand the tide inside it is delayed due to water not being able to instantly fill it as the tide rose. Then add the input of a river estuary flooding a lot of water into it and that will change the relative height.

    If by now you ask just where would that happen take a look at Galveston Bay. One satellite photo of recent note showed a lot of muddy brown water exiting the channel. San Francisco is another, this springs floods in CA did the same.

    Short answer, I doubt any tidal chart published will ever be spot on. Immediate geophysical conditions and climate will have a lot of influence. What happens on one side of a peninsula sea side won't be the same as bay side literally hundreds of yards away. Not to forget surge - the wall of water being pushed by high winds on the periphery of a storm. It can cause a temporary swell of water measuring ten feet and more. For that a look at the Bolivar peninsula during Ike would reveal some sobering discoveries.

    BTW, my wife and I visited Myrtle Beach last year - before Matthew - and walked the beach down to Springmaid Pier. It's what got my interest in tides started up. Hurricanes, not so much, Matthew demolished the pier. It was built the same year I was born.

    If it was all about an easy predictable tide we'd have tide graphs and indicators spot on world wide. So far we're lucky to get an app that's even close. That's hard to accept in horological circles, with measuring time to one ten thousandth of a second, or adjusting for leap years, moon phases, etc. The problem isn't getting the time right, it's programming a significant number of random geophysical and climate variables that affect the cycle. The result is our tide watches aren't as superlative as we would like.

    But we still keep horses and spring wound automatic Dive watches, pets are allowed to have inefficiencies.

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    Re: Tide Graphs on East Coast USA

    should have added the tidal interval, which for NJ is 7 hours 42 minutes.
    Call Sign - Wit
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    Quote Originally Posted by kubr1ck View Post
    the benevolent caretaker of a halfway house for recovering G-Shocks.
    Quote Originally Posted by kubr1ck View Post
    And the grand rehabilitator strikes again.

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    Re: Tide Graphs on East Coast USA

    Quote Originally Posted by Steelerswit View Post
    should have added the tidal interval, which for NJ is 7 hours 42 minutes.
    Doesn't that pink G-Lide use the home city and the first high tide time, rather than the longitude and lunitidal interval?

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    Re: Tide Graphs on East Coast USA

    It has home city, then several locations, one being AC.

    Sent from Capt. Kirk's Communicator
    Call Sign - Wit
    Si vis pacem, para bellum
    Quote Originally Posted by kubr1ck View Post
    the benevolent caretaker of a halfway house for recovering G-Shocks.
    Quote Originally Posted by kubr1ck View Post
    And the grand rehabilitator strikes again.

  8. #7
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    Re: Tide Graphs on East Coast USA

    Quote Originally Posted by Steelerswit View Post
    It has home city, then several locations, one being AC.

    Sent from Capt. Kirk's Communicator
    That's pretty nice. Looking at the module 3222 manual, it has home city and tide site, and also lets you set the first high tide time. This is the most elaborate setup I've seen on any of the tide graph models.
    Steelerswit and MainePorsche like this.

  9. #8
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    Re: Tide Graphs on East Coast USA

    And it's pink~

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    Call Sign - Wit
    Si vis pacem, para bellum
    Quote Originally Posted by kubr1ck View Post
    the benevolent caretaker of a halfway house for recovering G-Shocks.
    Quote Originally Posted by kubr1ck View Post
    And the grand rehabilitator strikes again.

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