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Founded in 1921, the International Hydrographic Organization, which has its head office in Monaco, is an intergovernmental organisation that, together with its member states, ensures that all physical characteristics of the oceans are measured and mapped in order to ensure the safety of navigation and to preserve the marine environment. These characteristics include sea level, the topography of the sea floor (mountains, volcanoes, ravines, etc.), ocean currents, etc. This information helps to establish uniformity for nautical charts, and is also useful for activities associated with renewable marine energy.

  • Design: Thierry MORDANT
  • Printing process: Heliogravure
  • Size of the stamp: 52 x 31,77 mm horizontal
  • Quantity of issue: 35 000 stamps
  • Sheet of 10 stamps with illuminations
Part First part
Year 2021
Design Thierry MORDANT
Printing process Heliogravure
Issue date 26 February 2021
Size of the stamp 52 x 31,77 mm horizontal
Quantity of issue 35 000 stamps
Note Sheet of 10 stamps with illuminations