Describe: This is tide prediction software for Psion Series 3a/c/mx. The program calculates high and low waters of the selected station and moon aspects for a given time. Water depths at intermediate times are approximated by a square sine curve. Data are made up of 1225 stations of Atlantic Coast of North America and 1134 stations of Europe and West Coast Africa. It's possible to add any new station. The program works until 1/18/2038. It includes atmospheric pressure correction and a height unit choice (feet or meters). Very fast download calcmar 31 rippers.