The Guardian (2006)

After losing his crew in a fatal crash, legendary Rescue Swimmer Ben Randall is sent to teach at "A" School, an elite training program for Coast Guard Rescue Swimmers. Wrestling with the loss of his crew members, he throws himself into teaching, turning the program upside down with his unorthodox training methods. While there, he encounters a young, cocky swim champ, Jake Fischer, who is driven to be the best. Upon graduation, Jake follows Randall to Kodiak, Alaska, where they face the inherent dangers of the Bering Sea. In his initial solo rescue, Jake learns the true meaning of heroism.

Official website: http://www.guardianmovie.com