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: MK IXA sextant
    From: David Pike
    Date: 2017 Jun 16, 09:10 -0700

    David, the Marks IX A, IXBM have the same works, except that the averager is two speed and a 2 power telescope has been added to the BM, i.e. in each case you have a "fresh cast" IXA body with a choice of averager and addition of telescope. Yhe Mark IX has different works with only a six shot averager.

    Bill Morris


    New zealand

    Bill.  I was issued with a MkIXBM during training in the 60s, but I had to hand it back when I progressed onto peri-sextants in 1968.  I now actually own two MkIXAs and a MkIX.  Last week, when I was in London, I was asked to look at two MkIXAs and a MkIXBM at the RIN.  The reason I asked was because the MkIXBM (last serviced in 1963) appeared to be something of a hybrid.  It had a two position averager, a double eyepiece, and a ‘wiggly pig-tail hanger’ but the left hand side casting had the original MkIXA and the relevant stores ref and section number poorly ground out and a new stores ref and section number and MkIXBM stamped alongside it.  Obviously by 1942 or 43 it was waste not want not, but I was wondering they ever cast left hand sides afresh for later MkIXBMs or if they had so many MkIXA sides unused that thy never needed to cast any new ones for the MkIXBs and BMs.  DaveP


    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