Certificate no 434
Status Registered


Function Fighting Vessel
Subfunction Torpedo Boat
Location Chatham
Vessel type Motor Torpedo Boat
Current use Museum based
Available to hire No
Available for excursions No
Info required No
Web address www.iwm.org.uk


Builder Camper & Nicholsons Ltd, Gosport
Built in 1921
Hull material Wood
Rig None
Number of decks 1
Number of masts
Propulsion Motor
Number of engines 1
Primary engine type Inboard
Boiler type None
Boilermaker None


Breadth: Beam
14.00 feet (4.27 m)
Length: Overall
72.46 feet (22.10 m)
Tonnage: Gross
Air Draft
To be confirmed


Built in 1921 by Camper & Nicholsons, at Gosport, for the Royal Navy, CMB 103 is a fast motor torpedo boat. Her wooden hull is formed into a stepped hydroplane and she originally had twin Thornycroft engines linked to twin screws.

The idea for these boats originated with three naval officers who suggested a fast hit and run torpedo carrier that could skim over enemy minefields and attack German surface shipping in the Heligoland Bight. Thornycrofts developed the theme with a series of hydroplanes all called MIRANDA. These were probably the world’s first planing craft and were the prototypes CMBs. Altogether 117 were built.


Earle, Jim, Defence Lines Osea Island & their Intervention, Defence of Britain Project, pp5-8, 10 May, Edition 10, 1998 
Brouwer, Norman J, International Register of Historic Ships, Anthony Nelson, pp144, Edition 2, 1993   
Sullivan, Dick, Old Ships, Boats and Maritime Museums, Coracle Books, 1978

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