PS Eagle III was a passenger-carrying paddle steamer that was built and sailed on the Clyde, and was twice requisitioned by the Admiralty to serve as a minesweeper during the world wars.

[1] Her machinery was of a traditional design, with a Napier-type "haystack" boiler and the last simple diagonal engine to be fitted to a Clyde steamer.

[1] When Eagle III returned to the Clyde in 1919 her owners had merged with a competitor to form Williamson-Buchanan Steamers and she resumed regular sailings from Glasgow to Rothesay and Loch Striven.

[1] With the outbreak of the second world war, in October 1939, she and other Clyde steamers like the PS Waverley were requisitioned again by the Admiralty for minesweeping duties.

[1] In 1940 Oriole and the other active members of her minesweeper flotilla were ordered away from their regular duties patrolling the coast from their base at Harwich to take part in the Dunkirk evacuation.