Originally built as M29, one of five small monitors designed to give
close in support to troops attacking coastal defences, was launched on 22May
1915. She was armed with two 6"guns one forward and one aft plus a small
calibre machine gun just forward of the bridge. As soon as she was
commissioned she was dispatched to the Mediterranean where she provided
support at Gallipoli. She was then sent to Egypt as protection for the Suez
Canal. After the end of WW1 she saw action when she supported the white
Russian forces in the Black sea. The exact dates of her conversion to a buoy
tender then coastal mine layer are not known but a year of 1927 for the mine
layer role is most likely. That is the target year for
this build. When she carried 52 'H' Type contact mines, she was later
converted to carry 16 'L' type remote detonation mines and this is how she
saw out the early part of WW2. In May 1941 Medusa was converted yet again to
a mobile repair workshop for minelayers. Not long afterwards she became a
submarine depot ship and renamed Talbot. Badly damaged during an air raid on
Malta in March 1942, renamed Medway II and towed back to Britain, finally
being scrapped in
1947.