After that, it has improved comfort and the structure start to have ships built out of steel instead of wood.And are used instead of wheels or propellers use diesel fuel instead of steam power.
After that I have improved comfort. And vessel structures began to be built out of steel instead of wood and the use of the paddle wheel. Or is it the locomotive of steam power.
After the improvement of comfort. Structure and the boat began to have constructed from iron instead of the constructed from wood.And there is a fan instead of the wheels. Or use a diesel oil instead of steam power.