The Spartel or Espartel Sill is the westernmost of the sills separating the Mediterranean Sea and the Atlantic Ocean. [1] This threshold is the second shallowest seafloor pass between the Iberian Peninsula and Africa. It is located near the Strait of Gibraltar and the Camarinal Sill, at 35°55′N5°47′W / 35.917°N 5.783°W , at a depth of −360 m. [2] The deep, salty and dense waters of the Mediterranean outflow must climb to that depth when flowing towards the Atlantic.