I'm not a regular reader of the Washington Post and as I recall some WP articles throw up a paywall, but the photo in this article is so startling to me I think this is one of the best links for this story. Three -- can we call them stowaways if they're outside the hull? -- rode the rudder of a tanker for 3,000 miles and 11 days from Nigeria to the Canary Islands, until they were picked up by the Spanish coast guard. Wow. Now there's a story for a book publisher. Amazing.
https://www.washingtonpost.com/world...s-ship-rudder/