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:
US Navy NG Ensign Tom Kerman assigned to the Los Angeles attack submarine USS Tucson SSN explains periscope operations to members of the University of Nevada football team during tour of the boat. en PEARL HARBOR Dec Ensign Tom Kerman assigned to the Los Angeles attack submarine USS Tucson SSN explains periscope operations to