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: Answers to Leg 84
    From: Dan Hogan
    Date: 2002 Oct 6, 09:44 -0700

    On 4 Oct 2002, at 18:29, Arthur Pearson wrote:
    
    > 1) ZT = 16:27 on 20/7/02
    Uhh..recheck this. ALL you need is time of Sunrise at Hilo + the elapsed time
    to the departure FIX.
    
    > 2) Using Mercator calculations in CelestNav, total distance of all legs
    > is 303.
    Off a little. I have found CelestNav to be "tricky" because of what it wants
    in info. The problem is just a DR traverse from point-to-point.
    
    > 3) 303/9.3 = 32.6 hrs = 32 hrs and 36 min.
    Close
    
    > 4) Sight directly overhead is very difficult, hard to know where to
    > bring it down. That said, declination on this day = 20d 31' which is
    > therefore our approximate latitude, which corrects or DR latitude by 7
    > miles)
    Right
    
    > 5) Solving the sights in Celestnav and plotting them yields 26d 00'N and
    > 157d 00' W.  CelestNav fix calculation yields the same position exactly.
    OK
    
    > 6) Mercator calculations in CelestNav give TC = 102, D = 4.8nm. Current
    > has negligible effect on course to steer, corrections of Var. and Dev.
    > give CC = 90.5 (anyone who can steer within 0.5 degrees, please email me
    > with instructions)
    OK
    
    > 7. Speed adjusted for current = 9.1. Divided into distance yields T = 32
    > minutes. Look over the bow and you won't need the compass.
    OK
    
    [Sniped original message]
    
    Dan Hogan
    dhhogan1---.net
    
    
    

       
    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