Definition
KOZR is the four-letter ICAO airport identifier for Cairns Army Airfield, located at Fort Novosel (formerly Fort Rucker) near Ozark, Alabama. The 'K' prefix indicates an airport in the contiguous United States, and 'OZR' is the three-letter FAA identifier derived from the nearby town of Ozark. Cairns AAF is a U.S. Army installation and is the primary site for Army helicopter flight training.
Plain English
KOZR is the official code used on charts and in flight plans for Cairns Army Airfield in Alabama. It's the same airport as 'OZR' — the 'K' is just added in front when using the international four-letter format.
Context Anchor
Seen on instrument approach charts, flight plans, and navigation displays when referring to Cairns Army Airfield.
Derivation
Airport identifiers in the contiguous U.S. take a 'K' prefix under the ICAO system to make them four letters long. 'OZR' comes from the nearby town of Ozark, Alabama. So KOZR simply means 'the U.S. airport with the FAA identifier OZR.'
Why Pilots Care
Using the correct airport identifier ensures the navigation system loads the proper approach, altitudes, and missed approach instructions for that specific airfield.
Intuition Check
KOZR is not a frequency, runway, or navigation aid. It is the airport identifier for Cairns Army Airfield.
Example Sentence 1
The VOR approach in Figure 4-52 is for runway 6 at KOZR.
Example Sentence 2
ATC issued a clearance direct to KOZR and then the published VOR approach.