HSwMS Wasa was a Äran-class coastal defence ship that served with the Swedish Navy.

A development of Dristigheten, the Äran class mounted the same 21 cm (8.3 in) main guns, but differed in the layout of the secondary armament.

A full load of 300 long tons (300 t) of coal was carried, which gave a design range of 2,000 nautical miles (3,700 km; 2,300 mi) at 10 knots (19 km/h; 12 mph).

[8][6] Armament consisted of two single Bofors 21 cm (8.3 in) guns mounted in turrets on the ship's centreline, one fore and the other aft.

Each of the guns weighed 10.90 tonnes (10.73 long tons) and could fire a 125 kg (276 lb) shell at a muzzle velocity of 750 m/s (2,500 ft/s).

[9] Secondary armament consisted of six Bofors 15 cm (5.9 in) guns mounted singularly in turrets amidships.

[12] In 1924, the vessel was withdrawn from front-line service, a noteworthy short life compared to the remainder of the class.

The ship's armour was removed and the vessel was reconfigured to act as a double to the newer Drottning Victoria to confuse enemy reconnaissance aircraft.