Kammala jumla mai zuwa: The ya kasance nau'i na takwas na Royal Navy. An yi la'akari da su daga 1883 zuwa gaba daga Admiral Sir Astley Cooper Key don maye gurbin jiragen ruwa na yanzu a matsayin kayan aiki don aiki tare da Rundunar Birtaniya da kuma don kare cinikayya; jimillar jiragen ruwa ashirin da aka tsara ta, amma kawai takwas aka gina. An umarci jirgi shida a karkashin Shirin 1884 kuma J &amp; G Thomson ya gina a Clydebank a Glasgow. An ba da umarnin wasu jiragen ruwa guda biyu a karkashin Shirin 1885, kuma an gina su a Devonport Dockyard tare da dukkan jiragen ruwa da aka kammala tsakanin 1887 da 1888. Waɗannan jiragen ruwa galibi suna aiki a cikin jiragen ruwa na ƙasashen waje na Daular Burtaniya suna kan tashoshi daban-daban a duk arewacin Tekun Atlantika, Pacific, da Tekun Indiya. A duk lokacin da suka yi aiki sun shiga cikin rikice-rikice na gida da dama ciki har da
Yaƙin Anglo-Zanzibar, Yaƙin Sino-Japan na Farko, da kuma Boxer Rebellion.