This week's collaboration with What is it? blog brings us this strange rocket-shaped device. Do you know what it is for? For more clues and larger picture, check out the What is it? blog.

No prize this week - you're playing for fun and bragging rights only! Have fun! (I can't wait to see Randall's guess!)

Update 6/21/08 - The answer is: A self-contained ship's log, it records the distance traveled as it's pulled behind a ship. Congratulations to Zack who got it first!