Geobukseon(Turtle Ship)

 
 
Geobukseon, inventde by Admiral Yi in 1592, is the world's first ironclad ship. It is said that his subordinate commander Na Dae-yong playde a major role in building the ship as a dopyeonsu(head carpenter). Geobukseon, which could accomodate a crew of 130 to 150, had two stories inside: some fo them can row it with oars and put loads on board in the first; others can fire guns and arrows at the enemy in the second. Its roof was covered with a great number of iron spikes to prevent the enemy from boarding. Sixteen oars and two sails were equipped for good mobility(about 11 knots per hour). There were two main gates, each in the front and the rear, along with four small emergency gates built on the top. Smoke could be emitted for a smoke screen to disorder the enemy from the dragon-shaped front
 
part(mouth) of the ship.
According to Nannung Ilgi, Geobukseon was first launched on open seas off yeosu in 27 March 1592 and it waw on 12 April of the year, the day before Japanese forces invaded Joseon, that it was equipped with canons such as Jijapo and Hyeonjapo for actual fighting. It played a great role in Admiral Yi's victory by being first deployed in his second campaign in Sacheon, Dangpo and Danghangpo. It was first callde Sogyeongbae(a blind ship). Its replica on display at Hyeonchungsa's Memorial Hall was produced on the basis of the size and shape of the Tongjeyeong-and JeoIla Jwasuyeong-version of Geobukseon described on complete works of Admiral Yi published in 1795. The replica, one sixth the original size, was donated by the Dong A Ilbo(a newspaper publishing company) in 1969.