Smaller littoral zone combatants in service are in the form of corvettes, of which the Indian Navy operates the Kamorta, Kora, Khukri, Veer and Abhay-class corvettes.[1][2][3] Replenishment tankers such as the Jyoti-class tanker, INS Aditya and the new Deepak-class fleet tanker- help improve the navy's endurance at sea.[4]