Guidelines for the Implementation of the Standards of Competence for Hydrographic Surveyors and Nautical Cartographers (Preview PR) S-Guidelines-S5-S8Guidelines-S5-S82019-05 International Hydrographic Organization IHO International Hydrographic Organization IHO2.1.0enin-force2019 International Hydrographic Organization IHO Standards and Specifications SspecificationHSSCIBSC