What is the Digital Memory Device (DMD)?

• A. A projection display in cockpit
• B. A navigation data module
• C. A programmable computer which functions as a non-volatile solid state memory device.
• D. A power regulator unit

Answer: (C)

The Digital Memory Device is a programmable computer that functions as non-volatile solid-state memory. In practice, this means it stores data and software in a way that remains intact when power is removed, using solid-state technology with no moving parts. The programmable aspect lets it be loaded with the software and data it needs, serving as reliable persistent storage and often providing some processing capability for other systems. It is not a cockpit projection display, not a navigation data module, and not a power regulator unit.