Table of Contents
What does IFF mean in aviation?
Identification Friend or Foe (IFF) Interrogators are electronic devices that emit an “interrogating” radio signal at one frequency, prompting an IFF Transponder to emit a reply signal at a different frequency, indicating that an approaching aircraft is “friendly.”
Do planes ever turn off?
NORMALLY all engines are switched off after each flight. Some airlines do taxy after landing with 2 engines ( out of 4) or 1 engine out of 2. Aircraft are powered electrically – either by APU or GPU on ground after engines are S / off.
Do fighter jets have transponders?
Military aircraft do have transponders that can reply to civil ATC radar and TCAS interrogations. Normally military aircraft operating in civil airspace are visible to civilian ATC and also will trigger TCAS advisories and alerts if they are getting close to airliners.
How does a 737 stop?
In general, when the wheels touch the ground, a set of spoilers raise up quickly, which kills the lift provided by the wings. This lever controls the speed brakes, or ground spoilers. Here, it is shown in the armed position, prior to landing (Image via Boeing 737 Technical Site / Chris Brady).
Why do flight attendants dim the lights for takeoff and landing?
The “dimming of cabin lights” only happens when it is dusk, dawn or dark outside the aircraft. This is a safety measure, and is to ensure your eyes are adjusted to the gloom enough to see the floor lights leading you to safety along the aisle in the event of a crash or emergency evacuation.
Is ADS-B required for military aircraft?
U.S. military and government aircraft flying in domestic-controlled airspace are subject to the FAA’s automatic dependent surveillance-broadcast (ADS-B) Out mandate, although certain exemptions apply.
What are SIF modes?
Modes 1, 2 and 3/A are collectively known as Selective Identification Feature (SIF) modes. Civilian aircraft use modes 3/A, C and S. Mode C which includes barometric pressure altitude information is often used in conjunction with mode 3/A. Mode S is a new civilian mode developed to replace both mode 3/A and C.