Welcome to the NavList Message Boards.


A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Add Images & Files
    Re: help with sun sights
    From: Alan S
    Date: 2011 Jan 14, 20:52 -0800


    Oops, I thought I had specified the 2010 edition of the NA, Looking again, I didn't, sorry.

    As to the dates and times, purely randon or arbitrary selections, as they say, having no connection with real persons living or dead.

    Re the following, Second, when you say "opposite 0.3, find 0.1" is the 0.3 the left-hand number in the first "v or d corrn" column and 0.1 on the right? It is, that is to say the 0.3 is the left hand number in the first V/D correction col. Not "stupid" at all. Most often, the really stupid or dumb question is the one one didn't ask.

    By the way, looking at Planets and Moon in Daily Pages one notes both V ad D figures. In conjunction with the increments and corrections tables, they work the same way. Re sight reduction of moon shots subtract V when Moon GHA gets smaller. Subtract D from Dec. when this gets smaller, going to the next hour or time. Re Planets, works the same way. By the way, re sight reeducdtion, I use the USPS Sight Reduction Form SR96a, downloadable from usps.org There are all mannwer of other reduction forms, some of which might woprk somewhat differently. The SR 96a is the one I'm familiar with, also for plotting the USPS CLS 98, also dwnloadable. The CLS 98 covers one degree of lat x one degree of long, not a great space, but quite adquate when one is going nowhere, as in standing on the beach, shooting such bodies, some of which are celestial, as happen to pass in view. It would serve when moving slowly too, at least during short time periods.

    Glad to help, hope I have.


    NavList message boards and member settings: www.fer3.com/NavList
    Members may optionally receive posts by email.
    To cancel email delivery, send a message to NoMail[at]fer3.com

    Browse Files

    Drop Files


    What is NavList?

    Join NavList

    (please, no nicknames or handles)
    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 Settings

    Posting Code:

    Custom Index

    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