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
    Name or NavList Code:
    Re: C. Plath Bubble Horizon
    From: R B Emerson
    Date: 2008 Jul 30, 10:27 -0700

    I'd like to branch this topic and ask about the older "full monty"
    Plath bubble horizon.  I have one and I've got some questions about
    First, the rubber around the eyepiece (call it an eyecup, I guess) is
    basically on its way out (dried out and crumbling along a part of the
    edge) - can anyone recommend a reasonable (good fit and costs less
    than a new sextant ;-) ) replacement?  Second, except with the solar
    filter over the objective, the bubble is simply too dim to be seen
    when shining a bright LED flashlight down through the opening for the
    bulb.  Even then, the image is very dim.  Advice on living with the
    bubble horizon, in general, is welcome (anyone got a PDF of the
    instructions?).  (The battery compartment in my Plath still needs
    help, thanks to a less than attentive prior owner - hence the test
    with a flashlight)
    I bought the unit as part of a sextant sold on eBay some time ago
    (well over 5 years ago at least).  In retrospect, this may have been
    something of a con job gone wrong as the sextant may well have been
    the Soviet SNO/CHO clone, sold as a Plath (what did I know?), but the
    bubble horizon is a for-real Plath horizon, bought for peanuts (I sold
    the sextant and the buyer didn't gripe - no hurt, no foul, I guess).
    On Jul 3, 5:24 pm, Ken Gebhart  wrote:
    > Joel,
    > About five years before C. Plath went out of production (say 6 years
    > ago?), they came out with abubblechamber which did not have the
    > adjusting mechanism. As I recall, it had an internal battery, and did
    > not rely on the batteries in the sextant handle.  I also seem to
    > recall that the light had no adjustable rheostat either.  I asked
    > them why they omitted these desirable features.  They replied that
    > they were made to milspec, and that's what the specs said.  They were
    > very expensive too, about $1700.  I believe this is the unit you have.
    > Their previous adjustable bubbles were very nice, and dated nearly
    > back to WWII.  I don't know when they were discontinued.
    > Ken Gebhart
    Navigation List archive: www.fer3.com/arc
    To post, email NavList@fer3.com
    To , email NavList-@fer3.com

    Browse Files

    Drop Files


    What is NavList?

    Get a NavList ID Code

    (please, no nicknames or handles)
    Do you want to receive all group messages by email?
    Yes No

    A NavList ID Code guarantees your identity in NavList posts and allows faster posting of messages.

    Retrieve a NavList ID Code

    Enter the email address associated with your NavList messages. Your NavList code will be emailed to you immediately.

    Email Settings

    NavList ID 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