HMIS Cornwallis (L09) was an Aubrietia-class sloop, originally built during World War I and commissioned as HMS Lychnis in the Royal Navy (RN) in 1917.

She was transferred to the Royal Indian Marine (RIM) and commissioned as Cornwallis in 1921.

[1] She served during World War II in the Royal Indian Navy (RIN), the successor to the RIM.

She is credited with sinking the German submarine SM U-64 by depth charging and shelling on 17 June 1918 in the Mediterranean Sea.

[3] Following the end of the war, she was transferred to the Royal Indian Marine and commissioned as HMIS Cornwallis.