National hydrographic office
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Logo of National Hydrographic Office, headquarters of Indian Naval Hydrographic Department stationed at Dehradun.
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| Military overview | |
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| Formed | June 1, 1954 |
| Preceding agencies |
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| Headquarters | National Hydrographic Office, 107-A, Rajpur Road, Dehradun,  India 30°20′41″N 78°03′29″E / 30.3447888°N 78.0580398°ECoordinates: 30°20′41″N 78°03′29″E / 30.3447888°N 78.0580398°E |
| Minister responsible | |
| Deputy Minister responsible |
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| Military executive |
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| Parent department |
 Indian Navy
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| Website | NHO Official |
The Indian Naval Hydrographic Department (INHD), headed by the Chief Hydrographer to the Government of India, is an Indian government agency responsible for hydrographic surveys and nautical charting in India. Presently, the department is equipped with eight indigenously built survey ships including a catamaran hull survey vessel (CHSV). The National Institute of Hydrography is the training institute to impart knowledge regarding hydrography and to train its personnel.
The department is also responsible for making electronic navigational charts officially on behalf of the government of India. The department has also signed memoranda of understanding with various countries for surveying their waters as part of international cooperation.
Hydrography in India originated back in the 17th century. The first chart of Indian Ocean was compiled by Thorntons of the British East India Company in 1703, which is considered as a major step towards the development of nautical charts of India. In 1874, the Indian Marine Survey Department was established in Calcutta; later it became a part of Royal Indian Navy.
After Indian independence in 1947, the department continued its functions under the Surveyor-in-Charge of the Marine Survey of India from Bombay. Later the office was shifted to Dehradun by renaming it as Naval Hydrographic Office headed by Chief Hydrographer of the Navy, which was later re-designated Chief Hydrographer to the Government of India in 1964. In view of international role of India in hydrography, the office was renamed once again in 1997 as National Hydrographic Office.
The National Hydrographic Office, headed by the Chief Hydrographer to the Government of India, is the headquarters of Indian Naval Hydrographic Department stationed at Dehradun. It is responsible for the publication of nautical charts relating to Indian on behalf of the government.
The Chief Hydrographer to the Government of India is the executive head of the Indian Naval Hydrographic Department. The Chief Hydrographer is generally held by a rear admiral or vice admiral from the Indian Navy. The Chief Hydrographer is also the coordinator for charting Area "J" in the North Indian Ocean and NAVAREA VIII coordinator.
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