|The Geobukseon was the battleship
of horror. It was the cause of the Japanese naval
forces always losing. The indomitable battleship,
of the Joseon Dynasty, always aided in bringing
Yi Sun-Shin didn¡¯t invent The Geobukseon all alone.
There were a number of people that participated
in the construction of The Geobukseon. Na Dae-Yong,
who lived from 1556 to 1612, played the most important
role pertaining to practical work amongst the assistants.
| Na Dae-Yong crashed
two Japanese battleships in the Okpo naval battle
in addition to helping with the construction of
He fought desperately against the Japanese invaders
in spite of a serious injury he suffered from bullet
wounds. He was a brave commander, along with Yi
Sun-Shin, in the Sacheon naval battle.
In ¡°The War Diary¡± we are told that The Geobukseon
was nearly completed by April 12, 1592. This was
only one day before the Japanese invasion. This
illustrates to us that Yi Sun-Shin foresaw the war.
He then strictly prepared for it when he was appointed
commander of the naval forces in the left sea of
The Geobukseon was the first ironclad ship built
in the world. The dimensions of Geobukseon were
similar to The Panokseon. The turtleheads on the
front and the tail each have one porthole. There
were also six portholes on each side. The back was
covered with iron sheets riveted with iron spikes,
which prevented the enemy from boarding the ship.
Our soldiers could move along the ship in a cross-shaped
narrow alley. It was important to protect our soldiers
from the enemy since hand-to-hand fighting was also
important during naval battles in addition to the
battleships shooting at each other. The Geobukseon
prevented the enemy from approaching because of
iron spikes that were placed on its back. This protected
the crews and the shooters. The Geobukseon was structured
in a particular manner so people could only see
from the inside. This resulted in the enemy not
being able to observe our soldiers.
The Geobukseon could crash against enemy battleships
because its hull was strong and the cannons could
be fired from both sides resulting in having an
advantage in an attack. The Geobukseon rushed at
will at hundreds of Japanese battleships and scattered
the enemy by firing in all directions. All different
kinds of firearms could also be used. These firearms
included: the cheonja, the jija, the hyeonja and
the hwangja chongtong.