Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Navigational info

The videotape I received was of poor quality (sound mostly). Although much of the dead reckoning navigation was very helpful, I found they went too fast in some areas, too slow in others. The delivery was very matter of fact. A more interesting delivery would have helped. I found sailing books more informative likeYour First Sailboat : How to Find and Sail the Right Boat for You. That is at least a great place to start for beginners.