Plain English Meaning
A button or option on a website that gives you a fixed web address pointing to exactly what you are looking at, so you can save it, bookmark it, or send it to someone and they will see the same thing.
Full Definition
A function on the FAA's Special Use Airspace (SUA) website that generates a permanent, shareable web link to a specific SUA status page or query result, allowing the same view to be retrieved later without re-entering the search.
Context Anchor
Seen when using FAA online special use airspace information during preflight planning.
Derivation
From 'permanent' + 'link.' The word was coined in the early 2000s by web developers who needed a way to describe a stable URL that always points to the same content, even after the page is updated.
Why Pilots Care
It lets pilots and instructors reliably share or bookmark details without the link breaking, supporting consistent access to -related information.