HMIS ''Jumna'' (U21) was a

sloop A sloop is a sailboat with a single mast typically having only one headsail in front of the mast and one mainsail aft of (behind) the mast. Such an arrangement is called a fore-and-aft rig, and can be rigged as a Bermuda rig with triangular sa ...

, which served in the

Royal Indian Navy The Royal Indian Navy (RIN) was the naval force of British India and the Dominion of India. Along with the Presidency armies, later the Indian Army, and from 1932 the Royal Indian Air Force, it was one of the Armed Forces of British India. Fr ...

(RIN) during

World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposin ...

. After India became a republic on 26 January 1950, the vessel was renamed as the

Indian Navy The Indian Navy is the maritime branch of the Indian Armed Forces. The President of India is the Supreme Commander of the Indian Navy. The Chief of Naval Staff, a four-star admiral, commands the navy. As a blue-water navy, it operates sig ...

's INS ''Jamuna''.

History

HMIS ''Jumna'' was ordered in 1939, and built by

William Denny and Brothers William Denny and Brothers Limited, often referred to simply as Denny, was a Scottish shipbuilding company. History The shipbuilding interests of the Denny family date back to William Denny (born 1779), for whom ships are recorded being built ...

. She was commissioned in 1941, and with

underway, was immediately deployed as a convoy escort. ''Jumna'' served as an anti-aircraft escort during the Java Sea campaign in early 1942, and was involved in intensive anti-aircraft action against attacking Japanese twin-engined level bombers and dive bombers, claiming five aircraft downed from 24–28 February 1942:
''"Chief Ordnance Artificer, Peter Cajetan Mascarenhas was awarded the Distinguished Service Medal for his part in defending the convoy against the Japanese aircraft which attacked it in the Sunda Strait. The citation in the London Gazette said that he had carried out repairs to guns during dive-bombing and machine-gun attacks, and had shown great devotion to duty. Leading Seaman Khan Mohammed, who displayed skill and initiative in engaging the Japanese with an Oerlikon gun was also awarded the Distinguished Service Medal. The Gunnery Officer, Lieut. A.J.V. LeCocq, R.I.N.V.R., was decorated with the Distinguished Service Cross and six of the Jumna's ratings were mentioned in Despatches, having shown "devotion to duty during heavy and continuous dive-bombing attacks".'' On 12 February 1944, The

Japanese submarine Ro-110 ''Ro-110'' was an Imperial Japanese Navy ''Ro-100''-class submarine. Completed and commissioned in July 1943, she served in World War II, operating in the Indian Ocean. She was sunk in February 1944 during her third war patrol. Design and descri ...

was depth charged and sunk east-south-east off

Visakhapatnam , image_alt = , image_caption = From top, left to right: Visakhapatnam aerial view, Vizag seaport, Simhachalam Temple, Aerial view of Rushikonda Beach, Beach road, Novotel, Novotel Visakhapatnam, INS Kursura (S20), INS ...

, India by the Indian sloop ''Jumna'' and the Australian

minesweepers A minesweeper is a small warship designed to remove or detonate naval mines. Using various mechanisms intended to counter the threat posed by naval mines, minesweepers keep waterways clear for safe shipping. History The earliest known usage of ...

and . ''Ro-110'' had attacked convoy JC 36 (Colombo-Calcutta) and torpedoed and damaged the British merchant ''Asphalion'' (6274 GRT). In early January 1945, she was deployed with to support the landing of the 74th Indian Brigade of the

British Indian Army The British Indian Army, commonly referred to as the Indian Army, was the main military of the British Raj before its dissolution in 1947. It was responsible for the defence of the British Indian Empire, including the princely states, which co ...

on the

Akyab Sittwe (; ; formerly Akyab) is the capital of Rakhine State, Myanmar (Burma). Sittwe, pronounced ''sait-tway'' in the Rakhine language, is located on an estuarial island created at the confluence of the Kaladan, Mayu, and Lay Mro rivers emptyi ...

Peninsula, as a part of Operation Lightning. ''Jumna'' and ''Narbada'' engaged Japanese batteries up the

Kaladan River The Kaladan River ( my, ကုလားတန်မြစ်, ; also Kysapnadi, Beino, Bawinu and Kolodyne) is a river in eastern Mizoram State of India, and in Chin State and Rakhine State of western Myanmar. The Kaladan River is called the Chh ...

near

Ponnagyun Ponnagyun ( my, ပုဏ္ဏားကျွန်းမြို့) is a town in Rakhine State, in the westernmost part of Myanmar Myanmar, ; UK pronunciations: US pronunciations incl. . Note: Wikipedia's IPA conventions require indi ...

. After embarking troops, she joined Task Force 64 headed by for support of landing by 3rd British Commando Brigade between Akyab and

Ramree Ramree or Ramarwaddy ( my, ရမ်းဗြဲမြို့, ) also known as Yanbye is a town in Kyaukpyu District, Rakhine State, Myanmar. Ramree (locally pronounced Ram Bray) is situated on Ramree Island. Ramree is the capital of the townsh ...

with the destroyer and HMIS ''Narbada''. Following Indian independence, she was allotted to India, becoming INS ''Jamuna'' in 1950 when India became a republic. She was later converted to a

survey vessel A survey vessel is any type of ship or boat that is used for underwater surveys, usually to collect data for mapping or planning underwater construction or mineral extraction. It is a type of research vessel, and may be designed for the purpo ...

and was decommissioned on 31 December 1980.

Notes

References

* * {{DEFAULTSORT:Jamuna (U21) Black Swan-class sloops of the Royal Indian Navy 1940 ships