Definition
The combined set of conditions outside the pilot that influence a flight, including operational factors (such as airplane performance, equipment condition, fuel state, airspace, traffic, air traffic control instructions, and the type of operation being conducted) and environmental factors (such as weather, visibility, wind, terrain, lighting, and time of day). Together they form a major component of situational awareness, alongside the pilot's awareness of self, passengers, and the airplane.
Plain English
Everything going on around the flight that affects how it goes — what the airplane is doing, who else is in the airspace, what the weather is like, and what the ground and sky around you look like.
Context Anchor
Seen in situational awareness and risk-management discussions when a pilot is checking what could affect the flight before takeoff or while in the air.
Derivation
Operational comes from operate, meaning to work or carry out an action. Environmental comes from environment, meaning the surroundings. Together, the phrase points to both the way the flight is being carried out and the conditions around it.
Why Pilots Care
Ignoring these factors reduces situational awareness and is a leading contributor to loss-of-control and controlled-flight-into-terrain accidents.
Grounding Statement
A pilot looks at the flight task and the surrounding conditions together, because both can affect the next safe decision.
Intuition Check
Do not read this as only weather or only aircraft procedures. Operational means how this specific flight is being carried out; environmental means the conditions around the aircraft and airport.
Example Sentence 1
Before descending into the valley, the pilot reassessed the operational and environmental factors: fuel remaining, fading daylight, rising terrain, and a layer of low cloud forming to the west.
Example Sentence 2
Mid-flight the crew reassessed operational and environmental factors when thunderstorms began to develop along the route.