Definition
A flight instrument arrangement consisting of separate, individual mechanical or electromechanical instruments — typically the airspeed indicator, attitude indicator, altimeter, turn coordinator, heading indicator, and vertical speed indicator — each driven by its own pitot-static, gyroscopic, or magnetic source rather than by an integrated electronic display.
Plain English
The traditional set of separate round dial instruments on an aircraft panel, as opposed to a single glass screen that shows everything together.
Context Anchor
Seen in pitot-static system malfunction discussions when the handbook explains how pressure-related instrument failures appear on traditional round-gauge panels.
Derivation
‘Conventional’ comes from the Latin convenire, meaning ‘to come together’ or ‘to agree.’ Over time it came to mean ‘the usual or accepted way.’ In aviation, conventional instrumentation refers to the long-accepted, standard arrangement of individual gauges that preceded electronic displays.
Why Pilots Care
Erroneous readings from these instruments during pitot-static failures can lead to loss of control if not recognized and corrected using backup methods.
Intuition Check
Do not read “conventional” as meaning “better” or “official.” Here it means traditional, separate-gauge instrumentation rather than a combined electronic display.
Example Sentence 1
The training aircraft was equipped with conventional instrumentation, so the student learned to scan six individual gauges during instrument practice.
Example Sentence 2
The handbook recommends covering inoperative conventional instrumentation gauges to prevent distraction during system failures.