This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Sierra class submarine. Source dodmedia osd mil JPEG DoDMedia Released to Public ID DNSN Service Depicted Other Service Aerial port view of Soviet Sierra class nuclearpowered attack submarine underway Photo Courtesy of Royal Norwegian Air Force Date Shot Nov Sierra class submarines Files by User Vsene PDUSGovMilitaryNavy Submarines