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
    Name or NavList Code:
    Email:
       
    Reply
    Re: sextant index error measurement
    From: Richard M Pisko
    Date: 2006 Nov 8, 14:56 -0700

    On Sat, 04 Nov 2006 01:03:48 -0500, Bill wrote:
    
    > I had lunch with an old college buddy a while back that was US
    > Navy and now owns a surveying company.  On topic he did
    > mention, if I recall correctly, that in some parts of the USA
    > traditional methods (optical?) had to take a break during the
    > hottest part of the day due to refraction.
    >
    I checked with a friend who worked in Arizona.  He said he had a
    "clear mental image of a range pole at a half mile looking like
    a snake through the transit", and that the more important angles
    were shot in the morning.  But . . . they kept working.
    
    Probably depends on the accuracy you need.
    
    --
    Richard, 2006-Nov-07 10:56:01 AM GMT - 6 hours for summer
    
    --~--~---------~--~----~------------~-------~--~----~
    To post to this group, send email to NavList@fer3.com
    To , send email to NavList-@fer3.com
    -~----------~----~----~----~------~----~------~--~---
    
    

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Get a NavList ID Code

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

    A NavList ID Code guarantees your identity in NavList posts and allows faster posting of messages.

    Retrieve a NavList ID Code

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

    Email Settings

    NavList ID 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