HMS Mimi and HMS Toutou

HMS Mimi and HMS Toutou were twin 40-foot (12 m) motor launches built by John I. Thornycroft & Co. in 1915. Initially commissioned for the Greek Air Force, they were acquired by the British Admiralty to form an 'inland navy' in Africa. Under the command of Lieutenant-Commander Geoffrey Spicer-Simson, the two boats were shipped from Britain to South Africa and then laboriously transported over 2,000 km by rail, river, and sheer manpower through the Belgian Congo to Lake Tanganyika. Their names 'Mimi' and 'Toutou' (French slang meaning 'meow' and 'doggie') were adopted after the Navy vetoed Spicer-Simson’s original plan to call them 'HMS Cat' and 'HMS Dog.'

Upon arrival at the lake in late 1915, the launches were reassembled and became the fastest vessels on those waters (powered by twin 100 hp engines, capable of 19 knots). Armed with a 3-pounder (47 mm) Hotchkiss cannon in the bow and a Maxim machine gun aft, they quickly proved their worth. On 26 December 1915, just after being launched on Lake Tanganyika, Mimi and Toutou surprised and captured the German gunboat SMS Kingani after a brief running battle. The seized vessel was repaired and commissioned into British service as HMS Fifi. In February 1916, Mimi (now accompanied by Fifi) engaged and sank another German craft, the Hedwig von Wissmann, further eroding Germany’s presence on the lake. These successes, combined with Allied advances on land, forced the Germans to scuttle their largest ship, the Graf von Götzen, and ensured Allied dominance over Lake Tanganyika.

After World War I, the two launches saw little further use. HMS Toutou was reportedly lost in a storm on the lake in early 1916, and HMS Mimi was eventually withdrawn and scuttled in the 1920s. Neither vessel survives today. However, their extraordinary journey and exploits in the heart of Africa remain a legendary episode of naval history, demonstrating ingenuity and resolve in overcoming enormous logistical challenges to defeat an enemy far from the sea.