What is hydrography?

About Hydrography

Branch of applied sciences which deals with the measurement and description of the features of the sea and coastal areas for the primary purpose of navigation and all other marine purposes and activities including offshore activities, research, protecion of environment and prediction services.

What is the use of Hydrographic Survey?

Use Of Hydrography

The main objective of conducting a Hydrographic Survey is to produce Navigation Charts both manual and digital (Electronic Navigation Chart) which gives a complete, accurate, easily understood and up to date picture of the area surveyed. A lot of supplementary information which are needed for inclusion in the Sailing Directions. List of lights etc can also be obtained during the conduct of Hydrographic Survey. However in modern usage it may include wide variety of other objectives such as measurement of tides currents gravity, earths, magnetism, and determinations of the phusical and chemical propertises of water.

What are the eligibility for the Courses?


Courses For Naval Officers

Basic Hydrographic Course

The entry level qualifications required for this course is a Bachelors degree in Physics, Chemistry and Mathematics or Chemistry as main and other two as ancillaries or a degree in Civil Engineering or equivalent qualificatins from any recognised university/institutions. Must also be in the possessions of Bridge watch keeping Certificate or Civil equivalent of anOcean going vessel.


The entry level qualification required for this course is minimum of two and a half years experience in Hydrographic surveying, having done either the Basic Hydrographic Course or a IHO B course from any other IHO recognised institution in the world or a degree in civil engineering from a recognised univerity/insitiution with at least eight years experience in hydrographic surveying in a national organisation.

Courses For Naval Sailors

Basic Q Course

The entry level qualification required for this course is (10+2) or its equivalent with Physics and Mathematics.


The entry level quailifiction required for this course is at least 7 year of hydrographic surveying experience after BASIC Q course or a diploma in hydrographic surveying from a recognised institute with at least 8 years of hydrographic surveying experience in a National organisation.

Courses For Civilians

Joint Director Hydrography (Personnel and Training)

National Hydrographic Office

107-A Rajpura Road

Dehradun, Uttrakhand-248001

E-mail: inho-navy@nic.in Website: hydrobharat.nic.in


The entry level qualification required besides being nautical bacjground for this course is:


The entry level qualification required for the course are Intermediate/Higher Secondary (10+2) or equivalent with Physics and Mathematics and at least two years of experience in Hydrograhic Surveying.

  • Bachelors degree in Phusics and Mathematics or a degree in Civil Engineering or equivalent qualification with at least two years of experience in Hydrographic Surveying. (or)

  • Eight years of expereince in Hydrographic Surveying after completion of the Survey Recorder I class course.(or)

  • Twelve years experience in Hydrograhic Surveying after completion of the Basic Q course.

Must be employed as a class II officer/group B officer


What are the duration of the courses?


For Naval Officers

Basic Hydrographic Course Duration: 29 Weeks Long Hydrogrpahic Course Duration: 49 Weeks

For Naval Sailors

Basic Q Course Duration: 16 Weeks Leading Q Refresher Course Duraiton: 11 Weeks Po Q Sr Course Duration: 18 Weeks

For Civilians

Civilian Hydrographic Course Duration: 10 Weeks Civilian Sub-ordinate Course Duraiton: 10 Weeks

When are the courses conducted?

What Courses?

Long Hydrographic Course: Second Week of March Basic Hydrographic Course: Second Week of July Basic Q: 1st Week Of Feburary/ Leading Q Refresher: 3rd Week of March and September Every Year Po Q Sr: 4th Week of August Every Year

Civilian Sub-ordinate Course

As Per Request From Maritime And Port Agencies

For Civilian Course Admission Details, Contact

Joint Director of Hydrography (Personnel and Training) National Hydrogrpahic Office 107-Rajpura Road Dehradun, Uttrakhand-248001 E-mail:inho-navy@nic.in Website:hydrobharat.nic.in


Guidelines for preservation and storage of Nautical Charts and Fair tracings as per National Hydrographic Office

Deterioration of materials over time is inevitable, but we can control how fast it happens. Some materials are susceptible to deterioration because of their composition and others as a result of storage conditions.

  •     Some types of translucent tracing paper are acidic and deteriorate more quickly because of their manufacturing process.
  •     Thin papers backed with cloth are sometimes damaged because the cloth and the paper react differently to changes in relative humidity and temperature. The paper may fracture or separate from the cloth, because of the tensions built up between the paper and the cloth backing.
  •     Starch-filled tracing cloth may be affected by moisture and mould.
  •     Oiled cloth and paper can become rancid.
  •     Diazo prints may turn yellow or brown over time. This is due to a reaction between the chemicals used to develop the image and oxygen in the air. Store these records away from light and copy them to another medium if they contain information of long-term value.

Correct Storage of Charts and Fair Tracings will aid their long-term preservation:

  1. For storage of Fair Tracings printed on Vellum Sheets and Paper Navigational Charts, it is recommended to have a dedicated storage space with temperature between 18 to 23 °C and a relative humidity between 45 to 50 per cent. If these conditions are stable then the natural deterioration of the objects can be moderated. Wide fluctuations in conditions can physically stress records and accelerate their deterioration. It is recommended for a storage area with stable conditions, where the temperature is around 23 °C and the relative humidity remains below 50 per cent. Materials degrade faster when exposed to ultraviolet (UV) light. Fluorescent tubes which are low in UV should be used wherever possible in storage areas. Lights should be turned off whenever possible. Storage areas should not have windows, but if they do they should be covered with curtains or blinds.
  2. Insects and rodents once attracted to a record storage area may start eating the records. To reduce the risk of infestation:
  •     don’t allow food to be eaten in storage areas
  •     keep floors, shelves and shelf tops clean
  •     bait regularly for rodents and fumigate annually for insects, but only fumigate if an infestation is found
  •     use sticky traps to monitor for infestation and insect type.


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