Douglas Lawrence Simmons, 32, vanished from the fishing vessel Arlene Gale on April 27, 1971, while the boat was working in Onion Bay near Raspberry Island and Kodiak, Alaska. He was known as D.L. Simmons and XX Slim.

The Alaska State Troopers opened a missing person case (agency case number A710092442) after he was reported lost from the vessel. His case was later entered in national databases, including NamUs as MP66858. There are few public details about how he went overboard or any eyewitness accounts, and no remains have been recovered.

The circumstances are noted as tied to the dangers of working on Alaskan fishing boats and the unforgiving waters around Kodiak Island, but the specific events aboard the F/V Arlene Gale that day remain unclear. If anyone knew Douglas, worked on that boat, or has information about his disappearance, please share what is known.