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2. Infrared search and track - Wikipedia

   en.wikipedia.org/wiki/Infrared_search_and_track

   The effect of reduction in friction between air and aircraft does not compensate for the better transmission of infrared radiation. Therefore, infrared detection ranges are longer at high altitudes. At high altitudes, temperatures range from −30 to −50 °C - which provide better contrast between aircraft temperature and background temperature.

3. Tracer ammunition - Wikipedia

   en.wikipedia.org/wiki/Tracer_ammunition

   The M276 is a violet-tipped 7.62×51mm NATO dim tracer that uses composition R 440, which is barium peroxide, strontium peroxide, calcium resinate for example calcium abietate, and magnesium carbonate. Tracer compositions can also emit primarily in infrared, for use with night-vision devices.

4. High-explosive incendiary - Wikipedia

   en.wikipedia.org/wiki/High-explosive_incendiary

   In warfare, high-explosive incendiary (HEI) is a type of ammunition specially designed to impart energy and therefore damage to its target in one or both of two ways: via a high-explosive charge and/or via its incendiary (fire-causing) effects.

5. Flare (countermeasure) - Wikipedia

   en.wikipedia.org/wiki/Flare_(countermeasure)

   Apart from military use, some civilian aircraft are also equipped with countermeasure flares, against terrorism: the Israeli airline El Al, having been the target of the failed 2002 airliner attack, in which shoulder-launched surface-to-air missiles were fired at an airliner while taking off, began equipping its fleet with radar-based, automated flare release countermeasures from June 2004.

6. Tumi Inc. - Wikipedia

   en.wikipedia.org/wiki/Tumi_Inc.

   Tumi, Inc. was a unit of Doughty Hanson & Co. from 2004 until after its 2012 initial public offering. [2] [3] Tumi's products are known for their black-on-black ballistic nylon. [4] Tumi is available at department stores and specialty stores, as well as over 120 Tumi stores and 200 shops around the world. [5]

7. Ground proximity warning system - Wikipedia

   en.wikipedia.org/wiki/Ground_proximity_warning...

   A diagram showing two aircraft paths, the lower of which would trigger GPWS. A ground proximity warning system (GPWS) is a system designed to alert pilots if their aircraft is in immediate danger of flying into the ground or an obstacle.

8. Synchronization gear - Wikipedia

   en.wikipedia.org/wiki/Synchronization_gear

   The delay between the end of the firing cycle and the arrival of the next firing impulse slowed the rate of fire in comparison with a free-firing machine gun, which fires the moment it is ready to do so; but provided the gear functioned correctly, the gun could fire fairly rapidly between the whirling propeller blades without striking them. [7]

9. Emergency locator beacon - Wikipedia

   en.wikipedia.org/wiki/Emergency_locator_beacon

   An emergency locator beacon is a radio beacon, a portable battery powered radio transmitter, used to locate airplanes, vessels, and persons in distress and in need of immediate rescue.