I havn't had time to test it properly yet, (I only finished the last animation a few hours ago) but Iv'e been ultra carefull so it should work fine (no spelling mistakes in the INI file, hopefully), If any one has any problems with it, post them here so I can update the download.
I'm not sure about the tech this should come with, it's an industrial revolution era unit, so it should be around that time.
With the sailing ships, they started off all wood with only sails, next the british used Copper plating to improve sea worthiness (reduces sea animals growing on the hull) and later converted sailing ships to steam (not as good as dedicated steamers cos of hull shape) and some steamers featured Iron plating on the Hull.
The HMS warrior featured an all Iron Hull, sails for normal transport and a Steam engine for high speed.
The more modern style Ironclads were not very sea worthy and because they relied on steam, they could only travel as far and as fast as their fuel would carry them. But eventualy the two styles merged, the ironclads becoming bigger and faster with improved naval engines and the Iron frigate losing its sails.
I'm going to do a dreadnaught as an intermediary between the industrial revolution Ships and the destroyer, but for now, I'd have it come with the steam engine (or if you are going to make it more powerfull, with Industrialisation).