Alaska's Inside Passage (IMAGE) McGill University Caption The waters of Alaska's Inside Passage are often calm as they are relatively protected from the Pacific Ocean. However, the tide changes in the region can be extreme and require experts at the helm. Credit Benjamin Barst Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.