Why in News? 

INS Sutlej arrived at Port Louis to conduct 18th Joint Hydrographic Survey in Mauritius. 

• Specialised hydrographic survey vessel of the Indian Navy, commissioned in 1993, currently based in Kochi. 
• Carries one Chetak helicopter, four survey motorboats. 
• Conforms to ISO 9002 digital survey accuracy standards, enabling production of electronic navigational charts (ENCs).