Aviation Dictionary

UPSWELL

Motion opposite the direction the swell is moving. If the swell is moving from north to south, a seaplane going from south to north is moving upswell.

Dictionary Term

UPSWELL

Definition

Motion opposite the direction the swell is moving. If the swell is moving from north to south, a seaplane going from south to north is moving upswell.

References

Seaplane, Skiplane, and Float Ski Equipped Helicopter Operations Handbook, Federal Aviation Administration, 2024