The crew aboard the Coast Guard Cutter Bertholf navigates through Alaska waters April 10, 2011. With capabilities for maritime homeland security, law enforcement and national defense missions, the Bertholf is the first of eight planned National Security Cutters commissioned to replace the aging 378-foot High Endurance Hamilton Class cutters that have been in service since the 1960s. U.S. Coast Guard photo by Petty Officer 2nd Class Walter Shinn.