A collected works of Admiral Yi Sun-sin produced by Yu Deuk-gong in 1795 by royal order(Jeongjo year 19).

The main part consists of six volumes and eight books, with addenda in two additional volumes of six books, for a total of eight volumes and fourteen books.

Volume 1 contains poems and miscellany; volumes 2 through 4 are official reports; volumes 5 through 8 are Nanjungilgi (war diary); and volumes 9 through 14 are the addenda.

It includes an illustrated frontispiece of the armored geobukseon “turtle ship.”