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.
Oakley and other scientists with the United States Geological Survey (USGS) used GPS collars to track 52 female bears from 2004 and 2009 recording 50 swims with an average of 96 miles (154 kilometers). The scientists even found evidence that cubs may be able to survive such swims as well.