Genjitsushugi Yuusha no Oukoku Saikenki - Ch. 55.1 - The Kingdom's Secret Weapons (2)

[pgalla]

You already have a method of propulsion, why not just create an aircraft at that point
better, faster, and more agile than a creature

Machines are susceptible to be destroyed if hit and out of commission. A creature can be healed by magic. I understand the propulsion other than a sea dragon, in which the creature is killed, injured or the lines cut from the ship like the 9 headed archipelago tactics use on their enemies.