Welcome to the NavList Message Boards.

NavList:

A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Message:αβγ
Message:abc
Add Images & Files
    or...
       
    Reply
    Re: Tides by bearing of the moon
    From: Brad Morris
    Date: 2009 Apr 8, 17:23 -0400

    http://tbone.biol.sc.edu/tide/tideshow.cgi?site=New+London%2C+Connecticut&units=f
    
    New London, Connecticut
    8 April 2009 - 9 April 2009
    41.3550� N, 72.0867� W
    
    2009-04-08  03:17 EDT  -0.22 feet  Low Tide
    2009-04-08  05:27 EDT   Moonset
    2009-04-08  06:19 EDT   Sunrise
    2009-04-08  09:18 EDT   2.73 feet  High Tide
    2009-04-08  15:27 EDT  -0.01 feet  Low Tide
    2009-04-08  18:42 EDT   Moonrise
    2009-04-08  19:21 EDT   Sunset
    2009-04-08  21:33 EDT   3.26 feet  High Tide
    2009-04-09  04:04 EDT  -0.25 feet  Low Tide
    2009-04-09  05:52 EDT   Moonset
    2009-04-09  06:18 EDT   Sunrise
    2009-04-09  10:02 EDT   2.67 feet  High Tide
    2009-04-09  10:55 EDT   Full Moon
    2009-04-09  16:10 EDT   0.02 feet  Low Tide
    2009-04-09  19:22 EDT   Sunset
    2009-04-09  19:51 EDT   Moonrise
    2009-04-09  22:15 EDT   3.31 feet  High Tide
    
    -----Original Message-----
    From: NavList@fer3.com [mailto:NavList@fer3.com] On Behalf Of Hewitt Schlereth
    Sent: Wednesday, April 08, 2009 5:18 PM
    To: NavList@fer3.com
    Subject: [NavList 7883] Re: Tides by bearing of the moon
    
    
    The method I used to use was to consider that on the day of the full
    moon, the luni-tidal interval listed in Bowditch for a given place
    would be the time of high tide.
    
    From my 1933 Bowditch, the High Water Interval for New London is
    9h30m. So on the  day of the full moon - tomorrow 4-9-09 - high tide
    at New London would be 0930 EST or 1030 DST.
    
    I don't have any tide tables here, so would a kind soul on the List
    look it up and see how old Nathanael did?
    
    Thanks, Hewitt
    
    On 4/8/09, frankreed{at}historicalatlas.com  wrote:
    >
    >  Hi Dave.
    >
    >  Next, try some place more tropical. Hawaii perhaps? :-) That should show 
    significantly worse behavior with respect to azimuth.
    >
    >  I wrote some code a few years back to do tidal calculations. It's much 
    shorter than the widely available X-tide code and only marginally less 
    accurate: http://fer3.com/arc/m2.aspx?i=100454.
    >
    >  Here's a question that's been in the back of my head for a long time... 
    which is a better predictor of tide times: the local hour angle of the actual 
    Moon or the local hour angle of the mean Moon (which we can imagine moving 
    along the celestial equator with constant angular velocity)?
    >
    >  -FER
    >
    >
    >
    >
    >  >
    >
    
    
    
    "Confidentiality and Privilege Notice
    The information transmitted by this electronic mail (and any attachments) is 
    being sent by or on behalf of Tactronics; it is intended for the exclusive 
    use of the addressee named above and may constitute information that is 
    privileged or confidential or otherwise legally exempt from disclosure. If 
    you are not the addressee or an employee or agent responsible for delivering 
    this message to same, you are not authorized to retain, read, copy or 
    disseminate this electronic mail (or any attachments) or any part thereof. If 
    you have received this electronic mail (and any attachments) in error, please 
    call us immediately and send written confirmation that same has been deleted 
    from your system. Thank you."
    
    --~--~---------~--~----~------------~-------~--~----~
    Navigation List archive: www.fer3.com/arc
    To post, email NavList@fer3.com
    To unsubscribe, email NavList-unsubscribe@fer3.com
    -~----------~----~----~----~------~----~------~--~---
    
    

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Join NavList

    Name:
    (please, no nicknames or handles)
    Email:
    Do you want to receive all group messages by email?
    Yes No

    You can also join by posting. Your first on-topic post automatically makes you a member.

    Posting Code

    Enter the email address associated with your NavList messages. Your posting code will be emailed to you immediately.
    Email:

    Email Settings

    Posting Code:

    Custom Index

    Subject:
    Author:
    Start date: (yyyymm dd)
    End date: (yyyymm dd)

    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site