I saw Sam's '3rd Annual Everybody Draws a Penguin Day!' tweet on Sunday afternoon just before was heading out for a bike ride.
With Ortelius cruising along the Neumayer Channel at about 10-11 knots (~20 km/h) it was amazing to see penguins overtaking us. Gentoo penguin can hit max 36 km/h when sufficiently motivated; chasing, or avoiding being, prey. The water was so still, so clear, I spent ages just watching them doing this.