This Gulfstream belongs to Greg "The Shark" Norman, one of the best Australian golfers. Note his shark logo on the fin. He was fond of this registration and used the same one on all his five Gulfstreams: G-III cn 392 (1994-1996), G-IV cn 1284 (1997-1998), G-V cn 518 (1999), G-V cn 578 (2000-2003) and G550 cn 5023 (2004-2010).