Unparalleled Battleship

It is similar to the world view of the ship girl. The deep-sea battleship turns into an evil warship, and the ship girl turns into a mage, but the admiral is still the same admiral. The admiral builds the warship through drawings and recruits mages. In the book, a warship must have different types of mages to operate, such as: fire mage, boiler mage, eagle eye mage, iron wall mage, array mage, etc. The bold and novel ideas made my eyes shine, but the writing is average and cannot be updated. Another note: This is a cool novel. The protagonist has unlimited resources from the beginning, but it seems to be a harem novel.