All the essential knots and boat retrieval techniques clearly illustrated and explained on durable waterproof paper that folds out. A great tool for clubs and schools as well as individual boaters. Information Included: Basic Z-drag 3:1 Vector Pull 2:1 Z+C 6:1 Double Z 9:1 Water Knot Double Fishermen's Knot Prusik Knot Double Figure 8 Knot Bowline Knot | 
