HMS St David was a Venturer-class minesweeper converted from the fishing trawler Suffolk Monarch for the Royal Navy in 1978.

[1] It was powered by Mirrlees-Blackstone diesel engines which provided 2,000 hp (1,500 kW) and allowed for a speed of 14 knots (26 km/h; 16 mph).

[2] The ship was built as Suffolk Monarch by Cubow of Woolwich in 1973 as a stern fishing trawler and was sold to Small & Co. Harvester was then chartered as HMS St David by the Ministry of Defence on 1 November 1978, alongside its sister ship HMS Venturer.

St David was allocated to the 10th Mine Countermeasures Squadron out of Cardiff and was equipped for deep team minesweeping.

[2] On completion of its charter, St David was returned to civilian service in November 1983 and renamed back to Suffolk Monarch in a new role as a standby safety vessel.