Another "What is it????"

[abunaitoo]

Got this from the friend moving off island.
He doesn't remember what it was for.
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[Shanghai Jack]

https://epicauctionsandestatesales.hibid.com/lot/70215-155077-72270/original-wwii-army-air-corps-a-7-octant-by-bendix/

Part of a navigational apparatus for the army air corps.

[abunaitoo]

So it's for looking at stars.

[Gewehr-Guy]

Old time navigational tools and techniques are fascinating to me, so much of that old knowledge has been lost.

[Winger Ed.]

Search "A-7 octant". You'll learn all about it.

You have a part for a air borne navigation instrument used in WWII air planes
and does the job of a ship navigator's sextant.