Mayfly, 1907
Type: Torpedo Boat ; former Coastal Destroyer ; Armament 2 - 12 pdr.. 3 - 18 inch tubes.
Launched : 29 Jan 1907 ; Disposal date or year : 7 Mar 1916
Disposal Details : Mined off the East Coast
Displacement: 244 - 7 tons. tons
Propulsion: 3 screws
Machinery notes: H.P. 3750 = 26 kts. Parsons turbine. 3 screws. Oil : 42/3., tons. ; Speed ; 26 knots ;
Notes:
Were originally named in order given: Gnat, Glow-worm, and Gadfly. No. 9 (ex Grasshopper). No. 10 (ex Greenfly), No. 11 (ex Moth). No. 12 (ex Mayfly), have been lost during the War. To distinguish.- One tube between funnels: funnels wide apart. 1914 Based at Sheerness - Chatham - in reserve commission. Tender to Actaeon

MB 107, 1915
Type: Motor Boat ; Armament ?
Notes:

12 Nov 1915 replaced, as a temporary measure, the RESOURCE II, Depot Ship at Southampton, destroyed by fire, as static MB DS, which was renamed RESOURCE and then RESOURCEFUL, until replaced by the HERMIONE (1893), circa 12 Jan 1916.