A technology belonging to Industry 4.0, the Internet of Ships (IOS), could improve shipbuilding in the coming years. To this end, the implementation of this technology in ship design tools, also known by the acronym CAD (Computer Aided Design), has been studied over the past few years. The purpose of this study is to explain one of the most interesting technologies available today, the Internet of Ships (IOS), used in the maritime sector. This technology is a complement to other existing technologies known as Industry 4.0, such as digital twin, cloud computing, or augmented reality.