Marine engineering refers to new construction, reconstruction and expansion projects for the purpose of developing, utilizing, protecting and restoring Marine resources. It is generally believed that the main content of ocean engineering can be divided into two parts: resource development technology and equipment and facilities technology, including: reclamation, offshore dam engineering, artificial islands, offshore and submarine material storage facilities, cross-sea Bridges, undersea tunnel engineering, submarine pipelines, Marine mineral resources exploration and development and its ancillary projects, offshore tidal power stations, Marine energy development and utilization projects.