Meggitt Avionics (MAv, also known as Meggitt UK) is a company that designs and manufactures air data and life support systems. Its products include flight displays, threat warning indicators (TWI), oxygen regulators, magnetometer heading sensors (MHS), repeaters, etc. The company also offers equipment repair and technical support services. Meggitt Avionics caters to the civil and military aircraft, UAS, and helicopter markets.