Quoin Island (Persian Gulf)
Introduction '''Quoin Island''' (also known as ''As Salamah Island'' and ''Great Quoin Island'') is the largest of three islands of the As Salamah Archipelago. It is the northernmost landmass of Oman and the traditional waypoint used by ships to define the entrance or exit from the Persian Gulf. Once a ship has declared a position of "Passed Quoin Inbound" the insurance rates for the ship will increase.The island has a triangular outline, is about  long and up to  wide, yielding an area of about .Quoin Island, Oman is not to be confused with Quoin Island, Yemen, which is in the Red Sea and also has a lighthouse; or Quoin Island in the Torres Strait of Australia, neither of which are way points.
References
External links *  maps.google.co.uk