1. International Hydrographic Organization. (2019c). S-122 Marine Protected Area Product Specification. Available at: https://registry.iho.int. Accessed 10 March 2022.
2. International Hydrographic Organization. (2019g). S-401 Inland ENC Product Specification. Available at: https://registry.iho.int. Accessed 10 March 2022.
3. International Hydrographic Organization. (2018m). S-247 Differential eLoran Reference Station Almanac Product Specification. Available at: https://registry.iho.int. Accessed 10 March 2022.
4. International Hydrographic Organization. (2018c). S-104 Tidal Information for Surface Navigation Product Specification. Available at: https://registry.iho.int. Accessed 10 March 2022.
5. International Hydrographic Organization. (2019d). S-123 Marine Radio Services Product Specification. Available at: https://registry.iho.int. Accessed 10 March 2022.