Geological Survey of India

Operator Profile

Key Facts

Current Title:
Geological Survey of India
English Title:
Geological Survey of India
First Established:
ICAO Code:


Narrative Summary

The Geological Survey of India (GSI), established in 1851, is a government organization which is an office attached to the Ministry of Mines of the Government of India for conducting geological surveys and studies. GSI is the prime provider of basic earth science information to the government, industry and the general public. In 1965 a separate Department of Airborne Mineral Surveys & Exploration (AMSE) was created in New Delhi by the Government with the objective of utilizing airborne geophysics in mineral resource exploration programmes. In September 1970 AMSE was absorbed into GSI as a specialised Wing. In 1973 the AMSE headquarters moved from New Delhi to Bangalore.

Under Operation Hard Rock, AMSE placed its first contract with a US aerial survey company to produce low-altitude aerogeophysical data during 1967-68. In 1971-72 the Compagnie Generale De Geophysique (CGG) of France was contracted to produce additional data. Further contracts were placed externally until in 1986, AMSE took delivery of its own dedicated aircraft, a DHC-6 Twin Otter. In March 2000 the TOASS sensing system on the aircraft was upgraded to modern standards.

Some time around 2010 ASME was renamed the Remote Sensing & Aerial Surveys (RSAS) Wing of GSI. In 2014 the RSAS took delivery of the first Heliborne sensing system, installed on a HAL Dhruv.

Key Dates

August 1851 Geological Survey of India first established.
1965 Department of Airborne Mineral Surveys & Exploration (AMSE) created.
1967 Contract for first aerial survey issued to US company.
September 1970 AMSE absorbed into GSI as a specialised Wing.
1973 AMSE Wing HQ moved from New Delhi to Bangalore.
1986 AMSE obtains its own aircraft for the first time – a DHC-6.
March 2000 DHC-6 aircraft based TOASS upgraded.
2010? AMSE renamed RSAS.
2014 RSAS obtains a survey-equipped helicopter for the first time.

Current Status

The aircraft of the GSI are fully operational.

Future Plans

With continuously increasing demand for survey work, another aircraft may be needed in the near future.


National Insignia

GSI aircraft are basically white overall, with a red fuselage cheatline that extends up the tail fin. The DHC-6 has full GEOLOGICAL SURVEY OF INDIA service titles on the fuselage sides, while the Dhruv just has the initials GSI.

Aircraft Serial Numbers

GSI aircraft operate with civil registrations.

Unit/Base Codes

Coding system not used.


Aircraft Designations

None – Manufacturers designations used

Current Aircraft Inventory

Aircraft Type Total Del’d Total Active Still on Order Role
De Havilland Canada DHC-6 Twin Otter 1 1 0 Survey
HAL Dhruv 1 1 0 Survey

All-Time Aircraft Used List

Aircraft Type Quantity Service Entry Out of Service Origin
De Havilland Canada DHC-6 Twin Otter 1 1986 current Canada
HAL Dhruv 1 2014 current India

Aircraft NOT Used

No false reports known.

Aircraft Losses and Incidents

No losses known.


Main Headquarters

GSI Complex, Vasudha Bhavan, Kumaraswamy Layout, Bangalore-560078 Karnataka.

Organisational Structure

The GSI includes a Remote Sensing & Aerial Surveys (RSAS) wing which operates aircraft for remote sensing operations.

Current Unit Assignments

Not applicable.

Historical Unit Assignments

Not applicable

All-Time Flying Units List

Not applicable.

Air Bases

Current Air Bases

The main base is at Bangalore.

All-Time Air Bases Used List

See above.

More Information


None known.


To be added


GSI official website

Airborne Geophysical Survey DHC-6

GSI to Deploy HAL Dhruv for Heliborne Surveys

Geological Survey of India looks to industry for funding

Airborne Mineral surveys & Exploration

Remote Sensing Aerial Survey

Any photographs illustrating this operator would be welcome.


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