My father and uncle served in the U.S. Merchant Marines during and after World War II. Not military and not quite civilians, researching the people who served aboard the merchant ships that supplied the fighters at the fronts can be a challenge. I just found a very useful instruction sheet written by Theron P. Snell describing where and how to locate information on specific ships. Unfortunately, this page was lost in the demise of GeoCities, but thanks to the Wayback Machine at Internet Archives, we can still take advantage of Mr. Snell’s notes.