From 18 July 2025, the Differential Global Positioning System (DGPS) correction service broadcasted by the Hydrographic Office of the Marine Department is temporarily suspended for maintenance until further notice.
Correction services are available from other sources, including nearby Differential Global Navigation Satellite System (DGNSS) stations listed in the International Association of Marine Aids to Navigation and Lighthouse Authorities (IALA) Table of DGNSS Stations.
(For information about operations in Hong Kong, contact GAC Hong Kong at [emailprotected])
