A small fleet was assembled for Operation Hurricane under the command of Rear Admiral A. D. Torlesse; it included the escort carrier , which served as the flagship, and the LSTs "Narvik", "Zeebrugge" and "Tracker". Leonard Tyte from the Atomic Weapons Research Establishment at Aldermaston was appointed the technical director. The bomb for Operation Hurricane was assembled (without its radioactive components) at Foulness, and taken to the frigate for transport to Australia. On reaching the Monte Bello Islands, the five Royal Navy ships were joined by eleven Royal Australian Navy ships, including the aircraft carrier . To test the effects of a ship-smuggled atomic bomb on a port (a threat of great concern to the British at the time), the bomb was exploded inside the hull of "Plym", anchored off Trimouille Island. The explosion occurred below the water line, and left a saucer-shaped crater on the seabed deep and across.