Nautical charting surveys are conducted by hydrographic surveyors working to both national and international standards such as the International Hydrographic Orgainsation (IHO) specifications, S-44. Hydrography is the science of measurement and description of features which affect maritime navigation, marine construction, dredging, oil and gas exploration and related activities. Strong emphasis is placed on soundings, shorelines, tides, currents, seabed and submerged obstructions.
The surveys may use a variety of sensors/techniques including Single Beam Echo Sounders (SBES), Side Scan Sonar, Multibeam Echo Sounders(MBES), Sound Velocity Profilers, temperature & salinity sensors, sediment sampling, ADCP, Mobile Laser Scanning (MLS), underwater photography/video, drone photography, motion senors and RTK/WAGNSS positioning. Discovery Marine undertakes nautical charting surveys using vessels ranging in size from 5m.