Why in news?
INS Sutlej is arrived at Port Louis, Mauritius, on September 29, 2025, to undertake the 18th Joint Hydrographic Survey mission between India and Mauritius.

Key points

• INS Sutlej is a specialised hydrographic survey vessel of the Indian Navy built by Goa Shipyard Limited and commissioned in 1993.
• It operates under the Southern Naval Command and is currently based at Kochi.
• The ship is equipped with advanced surveying and navigation systems including multi-beam swath echo sounding systems, differential GPS, motion sensors, sea gravimeter, magnetometer, oceanographic sensors, side scan sonars, and an automated data logging system.
• These systems meet stringent international/ISO 9002 digital survey accuracy standards necessary for producing electronic navigation charts and publications.
• It carries a Chetak helicopter and four survey motorboats.

INS Sutlej has been actively involved in hydrographic surveys of various regions including the Indian coast, Lakshadweep Islands, Andaman and Nicobar Islands, Maldives, Myanmar, and in international maritime collaborations such as joint surveys with Mauritius.

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