I'm always amazed that the Volvo Round the World boats don't all run into something down there, seems it's full of garbage, and some of that garbage is very large, empty, metal containers!

From the above article: "The Through Transport Club, which insures 15 of the top 20 container lines, has put the loss at fewer than 2,000 containers a year. But other industry sources say the number may be as high as 10,000. That would still represent far less than 1% of the containers traversing the world's oceans. Maersk, one of the world's largest lines, says that its highest annual loss in the last decade was 59 containers."

Hit one of those when you're surfing down a wave at 25kts, and it's going to leave a mark!