How to Read a Nautical Chart For those of us who remember the demise of the US Government's Chart No. 1 in 2000 (very similar to BA5011), this title is a welcome publication. Nigel Calder makes sense of the complex array of signs, symbols and graphic elements used in US nautical charts, and presents a number of original features to help readers optimise use of the data. He includes background information, international chart symbol equivalents, electronic chart symbology and detailed explanations of the practical aspects of nautical chart reading. 500 colour images.