This completely updated guide provides detailed piloting information for navigating from Mexico's Isla Mujeres and Cozumel to Belize and Guatemala's Rio Dulce, including the many offshore cays and reefs. GPS waypoints locate all harbor entrances and anchorages, complete with 117 original sketch charts, 185 photos featuring 16-pages of color photographs, many aerials and two large folded charts showing the entire area. This top selling cruising guide deserves space on the bookshelf of anyone who contemplates a visit to this magnificent area.