Welcome to the NavList Message Boards.

NavList:

A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Position-Finding

Compose Your Message

Message:αβγ
Message:abc
Add Images & Files
    or...
    Re: All Haversine Time Sight
    From: Tony Oz
    Date: 2018 Sep 8, 13:59 -0700

    Dear Greg!

    Thank you for sharing this nice find!

    My all-haversine tool-box groving bigger and bigger.

    There is one little thing I do not like about these formulas: the same-name vs contrary-name gimmickry.

    I'd rather prefer one set of rules (North and East are positive, South and West are negative) and one canonical form for each formula. Like Lat = ZD + Dec which is always correct if we follow the sign rule.

    I tried the sign rule with the "same-name" formulation of hav(t) - it seems to work OK. Now I'm checking if it works with the longhand all-haversine SR as well.

    Please comment.

    Warm regards,

    Tony

    60°N 30°E

    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