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: Revisiting A thought question
    From: Gary LaPook
    Date: 2007 Jan 02, 09:13 -0800

    You can look at the refraction table in the Air Almanac or in H.O. 249
    which have refraction corrections for various heights above seea level.
    
    Gary LaPook
    
    George Huxtable wrote:
    
    >
    > After an earlier message from Guy-
    >
    > | "Having just enjoyed a wonderful weekend at Lake Tahoe elevation of
    > | 6225 ft. I was thinking about what my height of eye would be if I were
    > | taking sites at this elevation? Not that I would be lost on the Lake
    > it is
    > | 22 miles long by 12 miles wide."
    >
    > Bill commented-
    >
    > | It struck me in the shower this AM I may have missed one point that
    > had been
    > | discussed a year or two ago.  That being reduced refraction in the
    > thinner
    > | air.  I don't recall the consensus--if there was one.
    > |
    > | The broadcast barometric pressure will be adjusted to sea level.  At
    > 6225
    > | feet multiply the broadcast BP by .823 for local BP.  The adjusted
    > BP will
    > | be off the almanac table, but gives you a starting point.
    
    
    
    
    --~--~---------~--~----~------------~-------~--~----~
    To post to this group, send email to NavList@fer3.com
    To unsubscribe, send email to 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