The Jumna was an Indian sloop of 1300 tons displacement launched in 1940. The Jumna was powered by two 3-drum type boilers providing a top speed of 18 knots and carried a complement of between 160 and 197. She was armed with six 4 inch dual-purpose guns and six 20 mm anti-aircraft guns. Found on http://www.probertencyclopaedia.com/browse/RJ.HTM