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: Historical question
    From: Frank Reed CT
    Date: 2004 Oct 24, 03:17 EDT
    Alex E wrote:
    "Then using both instruments (if you already have them!)
    for this sort of observation makes a sense. All distance
    observations, made by the Sextant, with maximal precision
    are not interrupted by altitude observations.
    And the quadrant (which was already set for altitude observations
    does not have to be reset.

    This permits the series of observations in a quick sequence.
    Using the quadrant in addition to the sextant indeed saves some
    time."

    Sure. Maybe that's a little excuse for Norie's wording. Or maybe he was just copying over his notes from a standard observation with three observers and it didn't occur to him that the part you're puzzling over wasn't required...

    But it seems to me that you would only get the benefit you're suggesting if you have TWO octants (a.k.a. quadrants) since you have to measure the altitudes of two bodies. I once did a set of lunars using a plastic sextant for the altitudes and a decent brass sextant for the lunar distances. I didn't notice any procedural advantage...

    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)