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Glossary - E

EHSI. See electronic horizontal situation indicator.

Electronic flight instruments. Flight instruments that use electronic devices to prepare and/or present information such as airspeed, attitude, altitude, and position.

Electronic horizontal situation indicator (EHSI). Electronically generated HSI display, either CRT or LCD type, indicating all standard HSI functions on a video screen instead of using mechanical components.

eLORAN. See long range navigation.

Engaged. A system mode or function that is actively performing its function.

Error-evident display. Any display that presents information in a way that makes errors more obvious and detectable.