   {|    |}  hms pathfinder was the lead ship of the pathfinder class of scout cruisers, and was the first ship ever to be sunk by a locomotive torpedo fired by submarine (the american civil war ship uss housatonic had been sunk by a spar torpedo). she was built by cammell laird, birkenhead, launched on 16 july 1904, and commissioned on 18 july 1905. she was originally to have been named hms fastnet, but was renamed prior to construction. ==career== not long after completion, two additional 12 pounder guns were added and the 3 pounder guns were replaced with six 6 pounder guns. in 1911â12 they were rearmed with nin
1904_ships Mersey-built_ships Pathfinder-class_cruisers Ships_sunk_by_German_submarines_in_World_War_I World_War_I_cruisers_of_the_United_Kingdom