Esterline says that it divides its activity into three segments: “Avionics & Controls, Sensors & Systems, and Advanced Materials.” (company website).
Its Avionics segment focuses on “technology interface systems for commercial and military aircraft and similar devices for land- and sea-based military vehicles, cockpit displays and integration systems, flight training and simulation equipment, secure communications system” (company website).
The company states that it is “the producer of the largest and most varied line of combustible ordnance and countermeasure products in the world” (Esterline website). It is a major manufacturer of flares to protect combat aircraft from heat-seeking missiles. It also manufactures a variety of ammunition, including its MACS system: “155mm Modular Artillery Charge System (MACS)” (Esterline website).