To accurately measure the seabed underneath the vessel we need to know exactly where we are on the planet. All our vessels are equipped with accurate positioning satellite technology for navigation. Systems vary on some vessels but follow the same principle, for example C-Nav DGNSS (Differential Global Navigation Satellite Systems) provides the primary navigation on the Celtic Voyager.
High accuracy GPS systems are required to precisely position hydrographic data in order to comply with the International Hydrographic Organization (IHO) Standards for Hydrographic Surveys (Special Publication n. 44).
More information on GPS is available under the blue button.