Definitions for "Avigation easement"
the right adopted by airports and others to own the right to airspace around an airport or property.Airports seek this right to use the air space for flights, and other airport activities.If you purchase a foreclosed property near an airport, it is important to check what air rights you have.You may find that you are not able to set up structures higher than a specific height.
an easement of right to navigation in airspace over designated land
The right granted by a land owner to an airport to use airspace above a specified height for the flight of aircraft. The owner may be prohibited from using the land for structures, trees, signs, stacks, etc. higher than a specified measure. Such restrictions will vary according to necessary glide angle.