[Milsurplus] OT: What is the purpose of the 4th pointer on my Kollsman 671CLU-4-038 pressure altimeter?

[Glenn Little WB4UIV]

Possibly for setting barometric pressure at ground?

See: 
<http://www.parttarget.com/6610-00-514-4178_6610005144178_671CLU4-038.html/-A8A0127F-6FAB-43BF-AE7A-743D22539AED>

For some info.


73
Glenn
WB4UIV


On 7/11/2016 6:18 PM, Clare Owens wrote:
> Hi All,
>
> The altimeter has the usual three pointers in its center, for
> 100/1000/10000 feet.  But it also has a little triangular pointer that
> rotates around the edge of the dial and moves at about the same speed as
> the 100 foot pointer.  When the three normal pointers are at zero, the
> one on the edge ia pointing to just a little below 6.8.  Seems odd and I
> can't find any reference to the edge pointer on line.
>
> It looks like this unit needs to be recalibrated and I've found
> instructions for that.
>
> The altimeter has the typical Navy "US with anchor" stamp on its back.
>
> Any Navy aviators out there?
>
> Thanks,
>
> Clare
>
>
>
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

-- 
-----------------------------------------------------------------------
Glenn Little                ARRL Technical Specialist   QCWA  LM 28417
Amateur Callsign:  WB4UIV            wb4uiv at arrl.net    AMSAT LM 2178
QTH:  Goose Creek, SC USA (EM92xx)  USSVI LM   NRA LM   SBE ARRL TAPR
"It is not the class of license that the Amateur holds but the class
of the Amateur that holds the license"
---------------------------------------------------------------------------