Laid down as HMS Marksman (G 23), launched as HMS Mahratta (G 23)
The completion of the destroyer was delayed until April 1943, because the yard was bombed by the Luftwaffe in 1941. After working up at Scapa Flow, she was part of the escort for the British steam passenger ship Queen Mary with Churchill on board. On 4 Jun, 1943, the destroyer took part in Operation FH, leaving Seidisfjord, Iceland to relief the garrison at Spitzbergen. In July, HMS Mahratta (G 23) and HMS Musketeer (G 86) made their first high speed run to Murmansk carrying important supplies. The ship took part in the Operations Camera and Governor, movements designed to simulate a landing on the Norwegian coast to distract the Germans from the landings in Sicily.
In August 1943, the destroyer sailed with the 10th Cruiser Squadron for Operation Lozry, covering the passage of destroyers with personnel and stores to Kola. Mainly the personnel and parts for the Spitfire reconnaissance aircraft, which monitored the German battleship Tirpitz in the Altenfjord. The battleship and several destroyers were at sea, but missed the convoy and later shelled Spitzbergen. In September 1943, the destroyer sailed to the Bay of Biscay to meet the HMS Valiant (02) and three aircraft carriers. Two of the carriers returned to Gibraltar with an escort of four destroyers, but the HMS Matchless (G 52) broke down and had to be taken in tow by the HMS Mahratta (G 23) for several hours until the chain parted. Later that day, the destroyer picked up the survivors from a Hampden aircraft, which had been shot down by an U-boat off Bordeaux. The survivors had been in the dingy for eleven days. The destroyer arrived on 10 October at Plymouth for an overhaul.
On 15 Nov, 1943, the HMS Mahratta (G 23) escorted the convoy JW-54A from Loch Ewe to Kola Inlet and on the return passage the convoy RA-54B. The destroyer made two more passages on the Arctic convoy route until her last with convoy JW-57.

The HMS Marhatta (G 23) was awarded the Battle Honour Arctic 1943-44.