Since the density of pure water ice is ca. 920 kg / m3, and that of sea water ca. 1025 kg / m3, typically, around 90 % of the volume of an iceberg is under water, and that portion's shape can be difficult to surmise from looking at what is visible above the surface. (sciencedaily.com)
The debate continues, but a new finding shows that its outermost moon, Hydra, is coated with nearly pure water ice. (techtimes.com)
The deposits are exposed in cross section as relatively pure water ice, capped by a layer one to two yards (or meters) thick of ice - cemented rock and dust. (sciencedaily.com)