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.
In fact, polar bears are capable of swimming enormous distances in the wild and are classified as marine mammals in the United States. In 2005 scientists reported that they had tracked a tagged polar bear as it swam a distance between 74 km (46 miles) and 99 km (62 miles) in a 24 hour time period.