Today’s invention is a seaplane with floats that can rotate (and detach).
The left image shows the normal flying configuration, seen from below.
The right hand image shows the floats rotated to act as extra wings and thus give added lift in mountainous regions.
The middle image shows one float rotated to support the plane, whilst parked on the water.
The other float can then be removed to act as a canoe…or even a minisub.