Robotics and automation are started being used in the last two decades as excellent tools for the monitoring, inspection, relief of suitable data related to buildings and infrastructure, for their monitoring and further maintenance, and nowadays they can be considered well accepted. Great attention must be devoted to maritime infrastructures, which are the focus of the Chapter, indeed the types of robotic solutions for inspection that should be considered can be unmanned aerial (UAV), ground (UGV) and underwater (UUV) vehicles. In this Chapter, all these types of robotic solutions will be presented and discussed, taking into account their main characteristics, advantages and limitations, also providing design issues. Commercial prototypes will be shown as illustrative examples.