This file is a work of a sailor or employee of the U.S. Navy , taken or made as part of that person's official duties. As a work of the U.S. federal government , it is in the public domain in the United States.
	This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights.

https://creativecommons.org/publicdomain/mark/1.0/ PDM Creative Commons Public Domain Mark 1.0 false false Underwater welding image, found by Spangineer at [1] . No author information is given, but a linked site [2] from the DOD says that the contents can be freely distributed.