Dead water

{
  "id": "MLC-T-MET-004876",
  "term": "Dead water",
  "field": "Meteorology and atmospheric science",
  "definition": "A phenomenon occurring in stratified waters where a ship's propulsion energy is dissipated by internal waves generated at the interface between layers of different densities. This results in a noticeable reduction in forward speed despite full engine power. It is most commonly observed in fjords or other areas with a distinct freshwater layer overlying denser saltwater.",
  "url": "https://mlchart.com/terminology/meteorology/dead-water/"
}