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Next, he abandoned the idea of a metallic hull. If Zachary lacked a Cave, he would have chosen a metallic hull without any hesitation.
Although it is said that no martial art can withstand a swift attack, that is said of people, not ships.
If the quality and grade of the material are similar, a wooden hull can be faster than an iron one, but it won't leave the latter far behind.
Furthermore, in naval battles, what matters is the weaponry on the ships. Unless the wooden hulls are of legendary level, their speed in water won't exceed that of the weapons for those below the legendary class.
Naval combat differs from land: once a ship is damaged, unless it quickly returns to dry dock, sinking is the only fate that awaits its crew.
In the current situation, with water levels a hundred meters above what they were before the disaster, most places lack not just land but also islands to dock at, forcing everyone to adopt a mode of survival on water.