Fontana-Maste. Donaumonitor mit Fontana-Beobachtungsmast von 25m Höhe....

Fontana-Maste. Donaumonitor mit Fontana-Beobachtungsmast von 25m Höhe. Alleiniges Ausführungsrecht in Österreich: Teudloff & Dittrich, Armaturen- und Maschinenfabrik Gesellschaft m.b.H. B.K.W.I. K.u.K. Kriegsmarine Donauflottille / Császári és Királyi Haditengerészet Dunaflottilla "Szamos" monitorja 25 méteres Fontana megfigyelő árbóccal / Austro-Hungarian Navy Danube Fleet river guard monitor SMS SZAMOS docked with her 25-meter high "Fontana Mast" fully extended.
A Fontana mast (patented in Germany in 1912) consists of a hollow mast built using a telescopic tubular system capable of being extended and retracted, having the same cross-measurements from top to bottom: a prismatic hollow mast with sides that may be coiled and uncoiled (ragasztónyom / glue mark)