On 11 January 1944, Tally-Ho, then based out of Trincomalee, Ceylon spotted the Japanese light cruiser Kuma and destroyer Uranami on anti-submarine warfare exercises about 10 miles (16 km) northwest of Penang.

Tally-Ho sank the German commanded U-boat UIT-23 (formerly the Italian submarine Giuliani), just off the western mouth of Malacca Strait on 14 February 1944.

Once submerged, the crew took stock of the damage, and apart from smashed light bulbs and gauge dial glasses, Tally-Ho appeared to be seaworthy, and she remained submerged until 06:30 of 24 February when Bennington brought Tally-Ho to periscope depth and observed his attacker making unusual manoeuvres apparently searching for the submarine on the starboard quarter some 4 miles (6.4 km) off.

With transfer of fuel and water from various tanks and moving of stores and torpedoes, the bow-down attitude was reduced to 4 degrees, and the three-day journey to Trincomalee commenced.

Arriving at Trincomalee harbour on 29 February 1944, Tally-Ho missed her escort and found herself amongst Admiral James Somerville's battle fleet at exercises.

Later, upon examination in dry dock prior to repairs, the extent of the damage to Tally-Ho's port ballast tanks became apparent.

The rotating screws of the torpedo boat had run the length of the tanks, chewing large holes in them, phosphor bronze fragments of the attacker's propeller blades being discovered inside.

On 6 Oct 1944, Tally-Ho sank the Japanese auxiliary submarine chaser Cha-2 (130 tons) about 110 nautical miles south-west of Penang, British Malaya in position 04°20′N 098°24′E / 4.333°N 98.400°E / 4.333; 98.400.

[3] In 1949, Tally-Ho was deployed to Canada in July, relieving HMS Tudor, where the submarine trained with the Royal Canadian Navy (RCN) in anti-submarine warfare.