HMS Tenby was a Whitby-class or Type 12 anti-submarine frigate of the Royal Navy of the United Kingdom.

The Whitbys were designed as specialist anti-submarine warships, intended to counter fast modern diesel-electric submarines.

Two Babcock & Wilcox water-tube boilers fed steam at 550 pounds per square inch (3,800 kPa) and 850 °F (454 °C) to two sets of geared steam turbines which drove two propeller shafts, fitted with large (2 feet (0.61 m) diameter) slow-turning propellers.

The machinery was rated at 30,000 shaft horsepower (22,000 kW), giving a speed of 29 knots (33 mph; 54 km/h).

[10] She was paid off into the reserve fleet on 8 December 1972 with the final ship's company leaving on 28 February 1973.