1903 CE–2026 CE
GEBCO coordinates a global bathymetric chart
Oceans, navigation & cartography · Hydrography & bathymetry · Institutions & standards
A commission chaired by Albert I of Monaco initiated the General Bathymetric Chart of the Oceans in 1903 to harmonize nomenclature and assemble soundings. GEBCO evolved from printed sheets to global digital atlases and grids; in 2026 it continues as a joint IHO–UNESCO-IOC program.
Precision, calendar, and review
- Start
- year · no uncertainty qualifier in this record
- End
- year · no uncertainty qualifier in this record
- Calendar and convention
- Historical-era years; the source calendar is not identified. No conversion of days is assumed.
- Year zero
- The scale goes from 1 BCE to 1 CE without year zero. Changing era names changes labels only.
- Documentary review
- Date not recorded
Reading the date: duration of a process.
Sources
- www.gebco.net (opens in a new tab)
Source provenance and scope
- Publication date
- Not identified in metadata; document review pending
- Bibliographic date checked
- 2026-09-23
The correspondence between this reference and individual claims has not yet been itemized.
This record is an editorial synthesis. Consult the sources to check claims and their limits. Chronological relationships alone do not establish causation.