32 oarsmen, and the oar holes could be hatched down when the ship was under sail. It utilized a square sail of approximately , which, it is estimated, could propel the ship to over . The mast could be raised and lowered. While the ship was traveling in shallow water, the rudder could be raised very quickly by undoing the fastening. Dendrochronological dating suggests that the ship was built of timber that was felled around 890 AD. This period is the height of Norse expansion in Dublin, Ireland and York, England. The Gokstad ship was commissioned at the end of the 9th century during the reign of King Harald Fairhair. The ship could carry a crew of between forty to seventy men. The ship's design has been demonstrated to be very seaworthy. Human remains and grave goods During the excavations, a human skeleton was found in a bed inside a timber-built burial chamber. The skeleton was that of a man aged approximately forty to fifty years old, of powerful build and between 181 and 183 cm (5’11" to 6') tall; his identity is unknown. The bones of twelve horses, six dogs, and one peacock were found laid out around the man's body. In the 1920s Professor Anton Willem Brogger of the University of Oslo asserted that the man was King Olaf Gudrodson, gout-ridden son of the elderly king Gudrod of Vestfold. But this has not been sufficiently proven. The grave was furnished with grave goods in addition to the ship itself: three small boats, a tent, a sledge, and riding equipment. Other grave goods were probably plundered in ancient times: the excavation in 1880 found no gold or silver. In the Viking period, weapons were considered an important part of a man's grave goods, but again, none were found in the Gokstad ship. Public exhibition The ship, the reconstructed burial chamber, two of the small boats and two tent boards from the burial chamber are displayed in the Viking Ship Museum located on Bygdøy peninsula in Oslo, Norway. Some other artifacts that survived the plundering are also on display in the museum. After thirteen years of debate regarding a possible relocation, Education Minister Kristin Halvorsen stated on May 3, 2012, that the ship would not be moved from Bygdøy. Replicas Viking, an exact replica of the Gokstad ship, crossed the Atlantic Ocean from Bergen, Norway to be exhibited at the