Topic 1: Ocean Exploration
Marine instruments and sensors
Marine Geodetic Information System
Marine Surveying and Engineering
Coastal radar
Automatic control
Current measurement technology
LiDAR
Passive observation sensor
Buoy technology
Cables and connectors
Airborne and satellite radar, as well as synthetic aperture radar
Space system 
Data visualization
Data modeling and simulation
Marine GIS and Data Fusion
Information Management
Real time data quality monitoring
Ocean Dynamics Information Technology
Sustainable utilization of water resources and protection of water environment
Water energy application technology
Marine Geography
River, Lake, and Ocean Survey and Monitoring
Marine Biology
Marine Chemistry
Marine Ecology
Marine Meteorology
Ocean Engineering
Ocean Dynamics Information Technology
River, Lake, and Ocean Survey and Monitoring
Monitoring technology for marine plastics and microplastics
Intelligent Ocean Internet of Things Technology and Its Applications
Monitoring and Prediction Model for Marine Environmental Changes
Exploration and development technology of deep-sea mineral resources
Topic 2: Underwater Acoustic Detection and Communication
Sonar systems 
Underwater positioning and navigation
Underwater Acoustic Communication and Underwater Internet of Things
Passive acoustic monitoring
Topic 3: Autonomous and Unmanned Detection Platforms
Autonomous Underwater Vehicles (AUVs) and Remote Operated Vehicles (ROVs)
Underwater gliders, biomimetic underwater robots
Unmanned Surface Vehicle (USV) Collaborative Networking
Deep sea lander and fixed observation nodes
Topic 4: Monitoring and Forecasting of Marine Environment
Online monitoring of marine water quality
Ocean acidification, hypoxia, and red tide warning
Monitoring of underwater earthquakes, tsunamis, and geological hazards
Polar Ice Exploration Technology