Gage or Gauge?

Some official aviation sources seem to use the spelling "gage" whether referencing cockpit instruments or aircraft maintenance tooling.

However, more broad English sources note that "gage" is either interchangeable with "guage," or flat out incorrect.

Is either spelling technically correct, or only one?

Do the different spellings hold different meanings or connotations in aviation?

Are there official examples that could make the argument "gage" could be correct in specific circumstances (patents, manuals, industry standards, trademarks)?

Is there a history in early aviation using "gage" that has been carried over unofficially to today (like how older aircraft operating today may have mph on their airspeed indicator)?

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    $\begingroup$ What's the context? $\endgroup$ – a CVn May 17 '18 at 17:40
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    $\begingroup$ You may get a better response on english.SE. Identifying the correct spelling of a word isn't very aviation-related, IMO, even if the word in question is. $\endgroup$ – Pondlife May 17 '18 at 17:53
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    $\begingroup$ "I see gage used rampantly in aviation" I'd be interested to know where. $\endgroup$ – Dan Hulme May 17 '18 at 17:54
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    $\begingroup$ "Some official aviation sources" Which ones? Please give a few specific examples. $\endgroup$ – a CVn May 18 '18 at 20:59
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    $\begingroup$ @RyanMortensen The question might have merit, but it'd probably be a lot easier to answer if OP just provides a few examples where (in this case) "gage" is used in aviation. As it stands, I think this is asking for us to guess at a little too much. $\endgroup$ – a CVn May 21 '18 at 16:39

Gauge is correct. As in Oil temperature gauge, Fuel Pressure gauge, Fuel Level gauge, Cylinder Head Temperature gauge, Exhaust Gas Temperature gauge, etc.

Anyone use gage is misspelling the word. Same with Hangar. (Not hanger)

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    $\begingroup$ To clarify, both "gage" and "hanger" are real words, but not as likely to be used in aviation (especially "gage") $\endgroup$ – fooot May 17 '18 at 17:52
  • $\begingroup$ @fooot I don't know; I might appreciate some kind of hanger in the cockpit of an airliner, to hang my coat on; especially during the winter months... $\endgroup$ – a CVn May 19 '18 at 19:22
  • $\begingroup$ Yes, but not for parking your airplane in so you can work on the gauges. $\endgroup$ – CrossRoads May 19 '18 at 19:23

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