Main CPU : Zilog Z80 (@ 4 Mhz)
Sound CPU : Zilog Z80 (@ 4 Mhz)
Sound Chips : (2x) Yamaha YM2203 (@ 4 Mhz)
Screen orientation : Horizontal
Video resolution : 384 x 224 pixels
Screen refresh : 60.00 Hz
Palette colors : 1024
Players : 2
Control : 8-way joystick
Buttons : 3
=>  GUN,  MISSILE,  THUNDER
This Korean game is a hack of Capcom's "Side Arms - Hyper Dyne", the Side Arms logo resides somewhere in the code. The font used in this game is also the standard Capcom font that appears in Side Arms, 1942, Commando, etc...
The game name was the Korean ship in Chosun dynasty 1392-1910. It's the first iron covered ship all over the world. General Soonsin Lee expected the invasion of Japan. So, he ordered developing the ship. When Japan invaded in Chosun in 1592 and general Lee and the Chosun naval forces fought with the Japanese, the ship killed a lot of Japanese soldiers. At last, in 1598, Chosun defeated the Japanese and fended off the invasion.
Geobukseon, also known as The Turtle ship, was a type of large Korean warship that was used intermittently by the Royal Korean Navy during the Joseon Dynasty from the early 15th century up until the 19th century.
A trademark called TURTLE SHIP was filed by Philko on December 05, 1988 (US Serial Number: 73767175).