A hydrographic office is an organization which is devoted to acquiring and publishing hydrographic information. Historically, the main tasks of hydrographic offices were the conduction of hydrographic surveys and the publication of nautical charts. In many countries, various navigation-related services are now concentrated in large governmental organizations, sometimes defined as "maritime administration" (the International Hydrographic Organization (IHO) uses the term "hydrographic offices" for its member organizations).
Besides nautical charts, many hydrographic offices publish a body of books and periodicals that are collectively known as nautical publications. The most important of these are:
Hydrographic Organizations may also be involved in services such as:
(SOURCE: wikipedia - Hydrographic Office)
International Hydrographic Organization (IHO) comprises of 98 Member States (National Hydrographic Offices)
IC-ENC Steering Committee (IC-ENC) comprises of 47 Members (National Hydrographic Offices)
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