"Fire!"
The Fire Crossbow Camp of Great Zhou, usually referring to a warship's Fire Crossbow Camp, required at least a Fifth Order Supreme Warship for equipment.
This was because smaller ships simply didn't have the space, as a single crossbow cannon measured 108 meters in length and 15 meters in width.
The crossbow cannon consisted of five parts: the base, fire stone, crossbow mechanism, firing muzzle, and crossbow arrow.
A Fifth Order crossbow cannon, with a capacity of sixteen hundred, could shoot eighty fire crossbow arrows per second. Calling them arrows wasn't quite accurate; they were more like giant spears.
A Fifth Order crossbow arrow was extendable, being five meters long and wrist-thick before firing, and expanded to thigh-thick and fifteen meters long after launch.