HSwMS Mode[a] was a torpedo boat destroyer of the Royal Swedish Navy.

[2][3] Four Yarrow boilers (two coal-fired and two with provision for mixed (coal and oil) firing) fed steam at 250 psi (1,700 kPa) to 2 four-cylinder triple expansion steam engines, rated at 6,000 indicated horsepower (4,500 kW), that drove two shafts.

[9] During sea trials in August 1902, Mode reached a speed of 32.4 knots (60.0 km/h; 37.3 mph),[7] making her briefly the world's fastest ship.

[8] For the trials, a specially trained team of engineers and stokers were provided by Yarrow, while fuel was high grade coal and some oil.

[11] During the First World War, Mode was employed escorting convoys of merchant ships from ports in the Northeast of Sweden to Øresund and the Kattegat.