Static pressure port

{
  "id": "MLC-T-MET-009217",
  "term": "Static pressure port",
  "field": "Meteorology and atmospheric science",
  "definition": "An opening on an aircraft's fuselage designed to measure ambient atmospheric pressure, undisturbed by the aircraft's motion. It is positioned in a location where the airflow is smooth and parallel to the surface to avoid errors from dynamic pressure. This pressure value is a primary input for the altimeter, which calculates altitude, and the airspeed indicator, which compares it with total pressure from a pitot tube.",
  "url": "https://mlchart.com/terminology/meteorology/static-pressure-port/"
}