In what year did the monarch whose flagship was called Griffen become king of Norway ?
Gribshunden: Gribshunden or Griffen (English: "Griffin-Hound" or "Griffin"), also known by several variant names including Gribshund, Gripshunden, Gripshund, Griff, and Griffone, was a Danish warship, the flagship of John, King of Denmark (r. 1481–1513). John, King of Denmark:  He was King of Denmark (1481–1513), Norway (1483–1513) and as John II (Swedish: "Johan II" ) Sweden (1497–1501).
1483