Definition
A ground-based training device that reproduces the responses of an aircraft to pilot inputs and changing conditions in real time, allowing a trainee to practice flight procedures, handling, and emergencies without leaving the ground.
Plain English
A simulator that reacts the way a real aircraft would when you move the controls or when something changes, so pilots can practice flying it on the ground.
Context Anchor
Seen in FAA acronym, abbreviation, and NOTAM contraction lists, especially where equipment, training, or testing references are shortened.
Derivation
Dynamic comes from the Greek dynamis, meaning power or force, and is used to describe something that changes and responds over time. Simulator comes from the Latin simulare, to imitate. Together, the term points to a training device that imitates an aircraft's changing behavior in response to inputs, rather than just displaying static information.
Why Pilots Care
A dynamic simulator lets pilots build and maintain skills, practice emergencies safely, and meet training requirements at far lower cost and risk than flying the actual aircraft.
Intuition Check
Dynamic does not mean exciting or dramatic here. It means the simulator changes in response to what is happening and what the user does.
Example Sentence 1
The flight school used a DYSIM to let students practice engine failures before attempting them in the aircraft.
Example Sentence 2
DYSIM training helps pilots build muscle memory for instrument approaches before flying the actual aircraft.