Rhumb-line course

{
  "id": "MLC-T-MET-008570",
  "term": "Rhumb-line course",
  "field": "Meteorology and atmospheric science",
  "definition": "A navigational path that follows a constant compass bearing, crossing all meridians of longitude at the same angle. While it is a straight line on a Mercator projection chart, it is a spiral on the Earth's surface that converges at the poles. A rhumb-line course is simpler to navigate than a great-circle route but is not the shortest distance between two points unless the course is due north, south, or along the equator.",
  "see_also": [
    "grid navigation"
  ],
  "url": "https://mlchart.com/terminology/meteorology/rhumb-line-course/"
}