The Hydrographic Institute of the Republic of Croatia (HHI) successfully completed a periodic surveillance audit of its Integrated Quality and Environmental Management System. The assessment was conducted by the certification body DNV between 27 and 29 May 2026.

Following the audit, it was confirmed that HHI's management system complies fully with the requirements of international standards ISO 9001:2015 and ISO 14001:2015. Furthermore, the prescribed criteria are being met in line with the scope of HHI’s policy and objectives. This means that the maintenance of the quality and environmental management system has been deemed a success. The audit also recommended the extension of both certifications. This further reinforces HHI’s commitment to the continuous improvement of its business processes, environmental protection, and the application of international standards across its operations.