...the contribution to achieving a decisive victory is by no means insignificant.

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The "Already-Across" Thunder original: 既濟雷 (Jiji Lei). The name "Jiji" refers to the 63rd hexagram of the I Ching (Book of Changes), which signifies "already completed" or "successful crossing." This implies a weapon designed to successfully traverse the waves to strike an enemy target.

Successfully-Across Thunder original: 既濟雷 (Jiji Lei), Treatise on Armament Technology original: 武備志 (Wubei Zhi), Fire Weapons original: 火器 (Huoqi), Illustrated Explanations of Fire Weapons original: 火器圖說 (Huoqi Tushuo)

(Illustration: A specialized naval vessel featuring a central cabin with a tiled roof and decorative swirl patterns along the hull. Notably, mechanical structures are depicted submerged at both the bow and the stern, likely representing the delivery mechanism for explosive "thunders" or steering apparatus for a fire ship.)