A feature in this context is meant to be any object, whether man made or not, projecting above the sea floor, which may be a danger for surface navigation. (Refer IHO document S-44). Features detected does not describe if features were actually detected during a hydrographic survey, but whether the survey had the capacity to detect features.
On behalf of the IHO Member States, the International Hydrographic Bureau would like to thank Korea Hydrographic and
Oceanographic Agency(KHOA) of the Republic of Korea for giving active support in the development of the S-100 GI Registry