Amazing Time Lapse From a Ship at Night

From Flickr description (with more video): Assembled in Quicktime from 2000 still images taken by using a Nikon D700 in the "interval timer" mode. The camera was fastened to an outside rail and set to take a photo every six seconds. Quicktime then assembled the photos into a .mov file that plays back at 12 frames per second. So, one minute of movie time represents 72 minutes of trip time on the channel. The first half begins just below the Port of Houston Authority Turning Basin (the very end of the channel) and continues down to Green's Bayou. The second half takes us from there to Morgan's Point at the head of Galveston Bay. From there we still have 31.5 miles of channel across the bay to the pilot station outside the Galveston jetties. It looks incredibly fast, but we were actually only making 5-6 knots in the first half and no more than 10 knots in the open areas of the second half.