ANN's Daily Aero-Term (06.29.07): Yellow Arc | Aero-News Network
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Fri, Jun 29, 2007

ANN's Daily Aero-Term (06.29.07): Yellow Arc

Aero-Terms!

Aero-Terms are designed to be a daily reminder of the terms, names, acronyms and explanations of the unique language that populates the aviation world. Aerospace, sport aviation, fixed wing, helo, you name it... it's all fair game.

Aero-Terms should serve as a quick but intriguing reminder of the terms you may use every day, or an introduction to an aspects of the Aero-World you may not yet be familiar with. ANN also encourages readers to go beyond the FMI link, and further research any intriguing terms.

Suggestions for future Aero-Terms are ALWAYS welcome, as are additions or discussion of the explanations given for each Aero-Term.

Yellow Arc

A range marking for aircraft instruments that identifies a caution area. The yellow arc on the airspeed indicator identifies a range of airspeeds that can be safely flown in calm air. The aircraft must not be flown at these speeds in turbulent air. No abrupt maneuvers should be performed in this speed range.

FMI: http://en.wikipedia.org/wiki/Airspeed_indicator

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