12 MEDICAL DEVICE REGULATIONS In Canada, devices of classes III and IV are subject to in-depth regulatory scrutiny,while class II devices require only the manufacturerâs declaration of device safety andeffectiveness before sale.
No problem: Polar bears in the study were seen swimming distances of 90 miles without any problems - and some bears went a lot further Scientists discovered that during the summer months, when sea ice is at its minimum, the bears were swimming farther and for longer periods of time than ever before in search of new hunting grounds.
This means that the distances, and costs to bears, to swim between isolated ice floes or between sea ice and land was relatively small. The extensive summer melt that appears to be typical now in the Beaufort Sea has likely increased the cost of swimming by polar bears.