Nether Ships

There are shipwrecks in the overworld flying ships in the end, why not have ships in the nether too? How did the ancient civilizations move across the lava? Just walking? Nether ships should have loot more common in the nether, like what is in Nether fortresses and what not. Though I think there should also be different variants with separate chests throughout the boat like the overworld shipwrecks. There should be maps in them just like in normal wrecks, but they should lead to fortresses or Bastions. That about all I could think of, but yeah.