SS Dundee was a British steamship that was built in Scotland in 1911 and sunk by enemy action in the Celtic Sea in 1917.

She was designed as a coastal passenger and cargo liner for the Dundee, Perth & London Shipping Company Ltd, but in 1915 she was converted into an armed boarding steamer for the Royal Navy.

She had a three-cylinder triple-expansion steam engine that was rated at 452 NHP,[2] which gave her a speed of 15 knots (28 km/h).

[2][4] She ran coastal cargo and passenger service between Dundee and ports on the east coast of England.

Dundee lowered one her boats, in which she sent a boarding party of five ratings led by a lieutenant to inspect the ship.

The raider also fired three torpedoes, but evasive action by Cdr Day and his helmsman ensured that they all missed Dundee.

Cdr Day concluded that Leopard had captured the boarding party, and all six men had then died when the raider sank.

Cdr Day credited his gunlayers' "skill" and "marksmanship" for crippling Leopard and preventing the raider from hitting Dundee.

[3] On Day's recommendation, in June 1917 two of Dundee's gunlayers were awarded the Distinguished Service Medal and two were mentioned in dispatches.