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: Doing my homework
    From: Frank Reed
    Date: 2016 Oct 31, 10:10 -0700

    Here's an example of sights from Stellarium. I've selected a location which you can see in the image below called spoiler-alert1.jpg. Do not look at that image until you're worked out the sights and fix. You are sailing from Massachusetts to Bermuda. Your DR position is 37° 15' N, 66° 30' W, and you're not moving. You have taken sights of Sirius, Aldebaran, Regulus, and Jupiter before sunrise. Altitudes and times are shown in the attached screen captures from Stellarium. Remember, the only altitude correction you require is refraction. Don't be misled by the notation showing an observer height of 25m. That's not height of eye for altitudes; it's height of observer for parallax-based changes in body position which are completely insignificant for these sights.

    Frank Reed



    File:



    File:



    File:



    File:



    File:



       
    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