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: Hamilton 992B as Marine Chronometer for 2018 GGR
    From: Greg Rudzinski
    Date: 2016 Dec 31, 12:22 -0800

    Francis,

    >Do you have any knowledge or experience of the Russian copies like MOLNIJA  which are on ebay for 30-40$ Also, a while back you discussed the US airplane 8 day clock as recommended by Letcher?

    >I would also take HO 208 and Fletcher ,+ Hewitt’s commonsense to get me out of left field problems. (is Doniol allowed? Recent but based on pre 1960s knowledge?)

    I have no experience with Russian chronometers :( The aircraft 8 day clocks are accurate (2-10 sec. per day) but are irregular on the daily rate so limited as a marine chronometer.  The railroad pocket watches look to be the way to go for retro navigating because they are designed to keep a constant daily rate and are readily available (enough on ebay to supply a fleet of 30 boats). For an around the world race it would be prudent to have two of everything critical. For skippers sellecting a 32 ft. sailing vessel the options are limited to small and light which means probably switching to Pub 208, Weem's Line of Position, and or Ageton short tables for sight reduction with 5 place trig log tables as the back-up. Pub 229 and anything published after 1969 would require a waiver from the race committee. The original Doniol as presented in 1955 using haversine and trig tables would be ok.

    Greg Rudzinski 

       
    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