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: ReRe: Level of observation accuracy
    From: Frank Reed CT
    Date: 2004 Jul 24, 15:29 EDT
    Bill wrote:
    "While I hate to admit it, started this quest a couple of months ago with
    Celestaire's Wurzburg cardboard sextant.  Manufacturer claims it can be
    accurate to within 8 minutes of an arc.  With a little mirror tweaking and
    putting a horizontal slit across the eye side of the viewing tube, am
    getting within 2-3 minutes consistently from seated position on a stable
    platform or tripod mounted.  So I figure plus/minus 3 minutes is my range of
    instrument slop.  Humidity does affect index error. <G>"

    Very interesting. Cheap sextants are nothing to sneeze at. Most people eventually prefer to get a fancy one simply because they look so professional, but by practical standards plastic and cardboard sextants are very good.

    Frank R
    [ ] Mystic, Connecticut
    [X] Chicago, Illinois
       
    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)