NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Fw: A little off topic _ Ebb and Flow
From: Bill B
Date: 2006 Jul 1, 23:38 -0500
Gut wrote:
> This may not be the correct group for the following question, however there is
> both sailing and math skills present here.
> The question:
> Is there a time relationship between High Tide and Max flood and converserly
> low tide and max ebb?
> For instance if high tide is 0118 what time was / is max flood. I suspect the
> number will vary with the height of the tide. I tried to put the information
> from the tide tables into a spread sheet, but could not detect a patern. To
> complicate the issue, on the west coast where I live we have to highs and two
> lows per day with one of the two being a higher high and a lower low.
Guy
The question is very "on topic" for traditional or modern navigation IMHO.
Tides, currents, (resulting in set and drift) are an important fact of
"navigational" life and always have been.
Timing of tides caused by the sun and moon might be fair game for a layman's
spreadsheet. If you have one local, you might be able to kludge together
something beyond that. Past that, local times for ebb and flow, slack water
etc. can be very situational, and in general the basic application is
probably below the interest level (more likely patience) of the list unless
you have a specific question(s). (I could be wrong--I often am.) I would
strongly recommend you pick up a copy of Dutton's, Chapman's, or Annapolis.
They will give you the background on durinal, semi-durinal tides etc., as
well as resources for calculating what happens at a particular location at a
given time. Then fire away.
Hope that helps in some fashion
Bill
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From: Bill B
Date: 2006 Jul 1, 23:38 -0500
Gut wrote:
> This may not be the correct group for the following question, however there is
> both sailing and math skills present here.
> The question:
> Is there a time relationship between High Tide and Max flood and converserly
> low tide and max ebb?
> For instance if high tide is 0118 what time was / is max flood. I suspect the
> number will vary with the height of the tide. I tried to put the information
> from the tide tables into a spread sheet, but could not detect a patern. To
> complicate the issue, on the west coast where I live we have to highs and two
> lows per day with one of the two being a higher high and a lower low.
Guy
The question is very "on topic" for traditional or modern navigation IMHO.
Tides, currents, (resulting in set and drift) are an important fact of
"navigational" life and always have been.
Timing of tides caused by the sun and moon might be fair game for a layman's
spreadsheet. If you have one local, you might be able to kludge together
something beyond that. Past that, local times for ebb and flow, slack water
etc. can be very situational, and in general the basic application is
probably below the interest level (more likely patience) of the list unless
you have a specific question(s). (I could be wrong--I often am.) I would
strongly recommend you pick up a copy of Dutton's, Chapman's, or Annapolis.
They will give you the background on durinal, semi-durinal tides etc., as
well as resources for calculating what happens at a particular location at a
given time. Then fire away.
Hope that helps in some fashion
Bill
--~--~---------~--~----~------------~-------~--~----~
To post to this group, send email to NavList@fer3.com
To , send email to NavList-@fer3.com
-~----------~----~----~----~------~----~------~--~---
