The very first british leviathan, as well as the first Leviathan, this vessel didn't even originally carry the prefix HML, since its own name had yet to be accepted as the description of such vessels.
This was the second electrical flying vessel witnessed by the general public, mere minutes after the french Ganymede had made its triumphant lift off over the Crystal Palace at the Great Exhibition of 1890. The vessel betrayed the fact that it was mostly based on steam locomotive technology
A young Jackie Fisher was the only officer aboard at the time, with the rest of the crew being cadets. borrowed from a training vessel.