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 NK submarine escape trainer instructor observes fellow instructor make an ascent to the surface inside the Submarine Escape Trainer at the Naval Submarine School. en GROTON Conn Dec submarine escape trainer instructor observes fellow instructor make an ascent to the surface inside the Submarine Escape Trainer at the Naval