The following ships of the Indian Navy have been named Investigator:
- Template:Ship was a survey ship of the Royal Indian Navy, launched in 1925 as the mercantile Patrick Stewart she was acquired by the Indian navy in 1934 and on conversion to a survey ship renamed Investigator. She was sold in 1951.
- Template:INS was a Template:Sclass2 of the Royal Indian Navy, launched in 1942 as HMS Trent she was transferred to India and renamed Kukri in 1946. Subsequently became INS Khukri and on conversion into a surveying ship in 1951 renamed Investigator. She was scrapped in 1975
- Template:INS is a Template:Sclass launched in 1987