I don't even remember seeing them on He 115s though.
Adam, the Do 24, BV 139 and other similar planes use their fuselages as main float. Others like He 115, Ju 52, BV 138 land on their floats so the camera device may be placed under de fuselage. Sorry do not remember correct English word to diferentiate both designs. In Portuguese we say Avião Anfíbio e Hidro Avião. Guess may be Amphibian Plane and Hidroplane?
