A hydrographic office is an organization which is devoted to acquiring and publishing hydrographic information. Historically, the main tasks of hydrographic...

The United Kingdom Hydrographic Office (UKHO) is the UK's agency for providing hydrographic and marine geospatial data to mariners and maritime organisations...

The National Hydrographic Office, formerly the Indian Naval Hydrographic Department (INHD), headed by the Chief Hydrographer to the Government of India...

The United States Hydrographic Office (USHO) prepared and published maps, charts, and nautical books required in navigation. The office was established...

its representative member organisations as the respective national hydrographic office(s). These organisations may themselves be part of wider national...

sailing directions. Prior to the establishment of the United Kingdom Hydrographic Office, Royal Navy captains were responsible for the provision of their...

navigational chart (ENC) is an official database created by a national hydrographic office for use with an Electronic Chart Display and Information System (ECDIS)...

modern nautical charts indicate depth in metres. However, the U.S. Hydrographic Office uses feet and fathoms. A nautical chart will always explicitly indicate...

His Majesty's Nautical Almanac Office (HMNAO), now part of the United Kingdom Hydrographic Office, was established in 1832 on the site of the Royal Observatory...

Canada and is Canada's authoritative hydrographic office. The CHS represents Canada in the International Hydrographic Organization (IHO). The CHS is administratively...