What is THIS??

JoK
20th November 2008, 12:03
Anyone have any idea what this is?
We certainly don't, it was in with our special tools. It is about 4"x6".
It has two bubble levels at 90* and three brass leveling screws.
The top has a smoked glass plate set into it.
Any thoughts?

Brad
20th November 2008, 12:34
Its an artificial horizon for use with a sextant.

That's my guess.

JoK
20th November 2008, 12:37
Well if that is the case, no wonder we didn't know what it was!!

I wonder if I should have posted this in the general mess topic.

Allan Wareing
20th November 2008, 13:00
Anyone have any idea what this is?
We certainly don't, it was in with our special tools. It is about 4"x6".
It has two bubble levels at 90* and three brass leveling screws.
The top has a smoked glass plate set into it.
Any thoughts?
Brad
Jok is right,in W.W.2 the Desert Rats used dirty sump oil in a shallow tray for the same purpose. It also had the advantage of not needing levelling screws.
From an ancient 'Ham Bone' user, Allan

mcotting
20th November 2008, 13:10
Does it get attached to the sextent? If so, how?

Brad
20th November 2008, 13:15
not sure how they work to tell you the truth, only that they are used when you can't see a horizon (eg. when you're ashore or close to land) I only ever used a sextant at sea so.....

you obviously wouldn't use it at sea..... i remember teasing loads of cadets with the spirit level gags.

mcotting
20th November 2008, 14:08
I thought maybe you could use it at sea when there was no clear horizon?? Like at night??
Of course, not needed now, what with GPS, ECDIS, ARPA, AIS, etc, etc.

JoK
20th November 2008, 16:09
That is what the Captain told me-used at night.
We have been looking at this for awhile, let me tell you.

K urgess
20th November 2008, 17:56
Not much use on a sextant.
There was usually a bubble fitting available or a special bubble sextant. They had a single bubble that had to be centred in a circle to get the sextant level.
This looks more like some sort of surveying instrument level.
There is something similair used for leveling an astro compass in an aircraft.

joebuckham
20th November 2008, 18:15
That is what the Captain told me-used at night.
We have been looking at this for awhile, let me tell you.

hi jok

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