Definition
An instrument that displays a measured value by the continuous movement of a pointer (needle) across a calibrated scale or dial, rather than by showing numbers directly.
Plain English
A gauge with a needle that sweeps around a dial face to show a reading, like a traditional clock or speedometer.
Context Anchor
Seen on aircraft gauges for items such as fuel quantity, oil pressure, temperature, and other measured conditions.
Derivation
From Greek analogos, meaning 'proportional.' The pointer's position is proportional to the value being measured — the further the needle moves, the higher the reading. This is the opposite of digital, where the value is shown as discrete numbers.
Why Pilots Care
Provides immediate perception of trends and rates of change that support rapid pilot decisions during engine operation or flight.
Analogy
It is like reading a clock with hands instead of reading the time as numbers on a phone screen.
Intuition Check
Analog does not automatically mean old or inaccurate. Here it means the value is shown by position on a scale instead of only by displayed numbers.
Example Sentence 1
The technician compared the analog indicator on the oil pressure gauge against a calibrated test gauge during the engine run-up.
Example Sentence 2
During preflight, the pilot verified that all analog indicators returned to their zero marks.