National Hydrographic Office India nautical chart

The nautical charts published by the National Hydrographic Office of India (INHO) are the official reference for navigation in waters under Indian jurisdiction. Offered by Nautic Way Maritime Bookshop, these charts are intended for professional mariners, experienced yachtsmen, shipping companies, and international trade operators navigating the Arabian Sea, the Bay of Bengal, and the Indian Ocean.

This category page provides a detailed presentation of Indian nautical charts, including their technical characteristics, advantages, and limitations, to help you select the most suitable charting solution for your navigation area and requirements.

The National Hydrographic Office of India: a major hydrographic authority

The National Hydrographic Office (NHO), also known as the Indian National Hydrographic Office (INHO), is India’s official hydrographic authority. It operates under the Indian Navy and is responsible for collecting, analyzing, updating, and disseminating hydrographic data essential for maritime safety.

As an active member of the International Hydrographic Organization (IHO), the INHO produces nautical charts compliant with international standards, recognized by navies, shipping companies, and maritime authorities worldwide.

With more than 7,500 kilometers of coastline, an extensive Exclusive Economic Zone, and a strategic position at the heart of major global shipping routes, India plays a key role in international navigation. INHO charts cover some of the most heavily trafficked and strategically important waters of the Indian Ocean.

Chart coverage of strategic maritime areas

Nautical charts issued by the National Hydrographic Office of India cover, in particular:

• India’s west coast (Arabian Sea)
• India’s east coast (Bay of Bengal)
• Major port approaches (Mumbai, Chennai, Kochi, Kolkata, Visakhapatnam)
• International shipping routes and straits
• The Andaman and Nicobar Islands
• Offshore areas and port access channels

These regions are characterized by dense maritime traffic, challenging weather conditions (monsoons and cyclones), complex currents, and shallow waters, all requiring accurate and reliable charting.

Types of nautical charts published by INHO

The National Hydrographic Office of India produces several chart formats to meet the needs of modern navigation:

Official paper nautical charts

Still widely used for voyage planning, maritime training, and as an onboard backup, Indian paper charts remain a trusted reference, particularly for professional vessels and maritime academies.

All formats are derived from the same official hydrographic databases, ensuring consistency and reliability across chart types.

Information included in Indian nautical charts

INHO nautical charts are distinguished by the depth and accuracy of the information they provide, which is essential for safe navigation:

• Bathymetry: depths shown in meters, detailed depth contours, shoal areas
• Coastlines and shore features: beaches, mangroves, estuaries, rocky areas, port infrastructure
• Aids to navigation: lighthouses, lights, buoys, lateral and cardinal marks
• Navigational hazards: wrecks, reefs, submerged obstructions, poorly surveyed areas
• Regulated areas: traffic separation schemes, military zones, port regulations
• Additional data: currents, tides, water level variations, cautionary notes

These elements are especially critical in regions affected by strong tidal ranges, seasonal currents, and intense maritime activity.

Advantages of National Hydrographic Office of India charts

Official and internationally recognized charting

The main advantage of Indian nautical charts lies in their official status. Produced or validated by the national hydrographic authority, they serve as the legal reference for navigation in Indian waters.

High accuracy in high-traffic areas

Indian waters are among the busiest in the world. INHO charts provide the level of detail required for safe navigation near major ports and along international shipping lanes.

Regular updates

The National Hydrographic Office ensures continuous chart updates, incorporating Notices to Mariners, new hydrographic surveys, and changes to port infrastructure and navigational aids.

Extensive maritime coverage

Indian nautical charts cover both coastal waters and remote offshore regions, making them indispensable for commercial shipping, naval operations, and offshore activities.

Limitations and drawbacks of Indian nautical charts

Sometimes high cost

Official nautical charts, especially paper editions, may represent a significant investment, particularly when covering large navigation areas.

High technical complexity

The standardized symbology and dense information content may be challenging for inexperienced sailors. A good knowledge of nautical chart interpretation or formal training is recommended.

Variable detail in secondary areas

In less frequently trafficked regions, some areas may offer a lower level of detail compared to major port approaches.

Who are INHO nautical charts for?

Nautical charts from the National Hydrographic Office of India are ideally suited for:

• Professional mariners and merchant shipping
• Captains operating in the Indian Ocean
• Experienced recreational sailors
• Maritime training schools and academies
• Offshore and maritime transport operators

They provide a reliable foundation for safe, compliant, and professional navigation.

Why buy Indian nautical charts from Nautic Way?

Nautic Way Maritime Bookshop offers a carefully selected range of official nautical charts from the National Hydrographic Office of India, tailored to the needs of demanding navigators.

By choosing Nautic Way, you benefit from:

• Official, up-to-date charts
• Expert advice in international nautical cartography
• Recognized maritime expertise
• Reliable service for professionals and passionate sailors

Conclusion

Nautical charts from the National Hydrographic Office of India are essential tools for safe navigation in Indian waters. Their accuracy, official status, and compliance with international standards make them an indispensable reference.

Despite their sometimes higher cost and technical complexity, they remain the preferred choice for navigators seeking reliability, safety, and regulatory compliance.

Before selecting your Indian nautical chart, it is recommended to clearly define your navigation area and operational needs. All paper and electronic charts are produced on demand and include the latest available updates. In accordance with current regulations, these products are non-returnable and non-exchangeable.

With Nautic Way, navigate confidently in the Indian Ocean using official nautical charts from the National Hydrographic Office of India.

Before choosing your nautical chart, it is interesting to know the particularities and differences between nautical charts.

All nautical charts are edited on request and include the latest updates; due to obsolescence, they can neither be returned, nor exchanged.