Petrell had hit an ice floe during a westerly storm and had sunk while the men were away hunting reindeer.
Uiguaq meaning what's adding on from the existing floe edge to the new one, and it occurs right through the winter.
Floes >2 km are generally the large multi-year floes referred to in the text, where numbers of emperor penguins were found.
Louise struck heavily and repeatedly against ice floes as she was towed, but suffered no damage, although a towing cable parted at one point.
Many birds were also seen on fast ice, particularly on the heavily ridged outer fringes, that might also be the source of the 'floating island' floes.
Therefore, it is imperative that they are mindful of the different movements and conditions along the floe edge to safely cross onto, or back from, the moving ice.
These monthly increases in tidal variation can be most destructive on ice conditions, and can cause the greatest variation in polynya size or floe edge dynamics.
The survivors were marooned on an ice floe and driven against a large berg.
