Definition
A short-range communications system that links equipment, facilities, or personnel within a single airport, facility, or limited geographic area. In aviation contexts, an LCN typically connects ground-based systems such as ATC equipment, navigation aids, weather sensors, and operations facilities so they can share data and voice traffic locally without relying on long-haul circuits.
Plain English
A small, local network used to connect equipment and people within one airport or facility, rather than across long distances.
Context Anchor
Seen in FAA acronym and notice-related material when the text is identifying communications infrastructure, not a cockpit control or a radio frequency.
Derivation
Local means within a small, defined area. Communications network means a set of connected devices that exchange information. Together: a network for local, on-site communication.
Why Pilots Care
A pilot may see LCN in reference material or airport information. Knowing that it means a local information network helps prevent mistaking it for a radio procedure, clearance, or navigation item.
Analogy
Think of it like the Wi-Fi and wired network inside one office building — everything inside talks to everything else quickly, without needing the wider internet.
Intuition Check
Do not read LCN as a radio call or a frequency. It refers to a local network used to move information between connected people or equipment.
Example Sentence 1
An outage on the tower's local communications network can disrupt how controllers receive weather and surveillance data inside the facility.
Example Sentence 2
During the power outage the tower continued operations using the backup local communications network.