Patrol boat HMS Brave Borderer during trials at Portsmouth.
Titles read: "PORTSMOUTH - WORLD'S FASTEST WARSHIP".
Various shots of HMS 'Brave Borderer', the new all-turbine patrol boat undergoing trials at Portsmouth. Several shots of the boat and inside it as she starts up and picks up speed. Mechanic tends three Bristol Proteus marine gas turbine engines. Captain at controls. Sailor holds onto his hat. Good shots of the boat travelling at speed.
Brochure on file.