Definition
The moment the upper edge of the sun first appears above the horizon at a given location. In aviation, sunrise is a specific published time used as a reference point for certain regulations, lighting requirements, and operational procedures.
Plain English
The official time the sun comes up at a particular place. Pilots use this exact time because some rules and lighting requirements change at sunrise.
Context Anchor
Seen in night flying discussions, preflight planning, weather briefings, and rules that refer to operations between sunset and sunrise.
Derivation
Sunrise comes from “sun” and “rise.” The word describes how the Sun appears to come up over the horizon, even though the apparent movement is caused by the Earth turning.
Why Pilots Care
Used when planning daylight operations and determining periods of night flying for currency and regulatory compliance.
Intuition Check
Do not assume sunrise means “when it starts to get light.” In aviation, use the official sunrise time for the location and date when a rule or flight plan depends on it.
Example Sentence 1
He timed the flight so they would land shortly after sunrise.
Example Sentence 2
Accurate sunrise data helps determine when night currency requirements begin and end.