It was established in the former Kriegsmarine Ruhleben Kaserne,[7] a barracks beside the Grosser Plöner See, near the Holsteinische Schweiz town of Plön in Schleswig Holstein.

The founding Headmaster was Lieutenant Colonel Freddie Spencer Chapman who introduced Kurt Hahn’s Gordonstoun ideals of service, discipline and strength of personality into the school ethos.

Each physically separate part-house, accommodation building was united by a strong house corporate identity.

During its short life of 11 years, KAS won, no less than six times, the Milocarian Trophy[18][19] for athletics in British schools, as well as the 4 x 110 yards relay race at the London Athletic Club's Schools' Meeting held in the White City Stadium, London.

[20] Apart from the usual school sports, there were also: Scouts, Guides and CCF camps, horse riding and dinghy sailing, as well as inter-house music and verse-speaking competitions.

During the latest Wyvern Club visit to the former KAS, now Marineunteroffizierschule (MUS), Ruhleben Kaserne, a 'Wyvie' crew of former pupils and their offspring competed in the Plön Dragon Boat Festival.