tide.h

class TideCalc {
 public:
     TideCalc();
    float currentTide(time_t now); // returns predicted tide for
    // the supplied date and time. The time should always be given in
    // the local standard time for the site, not daylight savings time
    // output units = feet
    char* returnStationID(void); // NOAA station name
    long returnStationIDnumber(void); // NOAA station ID number
};