I really enjoyed your article…but I do have one criticism. That second image, the photograph of a sailing ship. Its sails are all completely reefed, but it’s got a small “rooster tail” from the stern. In other words, it’s a propeller-driven ship, probably by a small diesel engine in the stern hull.

Please don’t take this as an effort to detract from your article — it’s just that sometimes my (thankfully mild condition of) OCD forces me to speak up when I probably shouldn’t.