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.
Making the world better, one answer at a time. Polar bears are efficient swimmers, for such large animals. While in the water they paddle with their front feet, and use the hind feet as rudders. They can swim at a speeds of 4-6 mph and paddle non-stop for 100 miles. Have been seen swimming several hundred miles from the nearest ice or land. While swimming, they keep their eyes open, their nostrils shut and their ears flattened to their heads. Polar bears can stay under up to 2 minutes.