Standards and technical specifications for our chart and hydrographic work

Our contractors need to follow standards and specifications when producing nautical charts and publications. You can read these hydrographic standards and technical specifications and view the International Hydrographic Organisation (IHO) resources here.

International standards

International standards that apply to our work are available from the International Hydrographic Organisation (IHO).

Interpreting ENCs

Refer to the following catalogues for interpreting objects and attributes of Electronic Navigational Charts (ENCs), which are available from the International Hydrographic Organisation (IHO):

Specifications for contractors

IHO Manual of Hydrography

The IHO publication C-13 Manual on Hydrography is another source of information on hydrography, the science of mapping the sea floor, as well as a guide on carrying out hydrographic surveys. It is also a tool for teachers and students involved in hydrographic courses or programmes.

IHO capacity building publications

Last Updated: 5 March 2020