Lost link (LL)

{
  "id": "MLC-T-AVN-000579",
  "term": "Lost link (LL)",
  "field": "Aviation and air traffic control",
  "definition": "An interruption or loss of the control link, or when the pilot is unable to effect control of the aircraft and, as a result, the UA will perform a predictable or planned maneuver. Loss of command and control link between the Control Station and the aircraft. There are two types of links:\n\na. An uplink which transmits command instructions to the aircraft, and\n\nb. A downlink which transmits the status of the aircraft and provides situational awareness to the pilot.",
  "abbreviation": "LL",
  "references": [
    "FAA Pilot/Controller Glossary"
  ],
  "url": "https://mlchart.com/terminology/aviation/lost-link-ll/"
}