changed description "Currently, tides are displayed using MSL (Mean Sea Level) format. It has been reported that that is not the universal format to show tides which is why I will add an option to tide modules allowing to choose from the following tidal datums: MSL (Mean Sea Level): The average sea level. The height of the sea surface averaged over a period of time (such as a month or a year), and over all stages of the tide. Used as a reference for elevations on land. LAT (Lowest Astronomical Tide): The lowest tide level possible under average meteorological conditions and under any combination of astronomical conditions. HAT (Highest Astronomical Tide): The highest tide level possible under average meteorological conditions and under any combination of astronomical conditions. MLLW (Mean Lower Low Water): The average of the lower low water height of each tidal day observed over the National Tidal Datum Epoch. MHHW (Mean Higher High Water): The average of the higher high water height of each tidal day observed over the National Tidal Datum Epoch. MHW (Mean High Water): The average of all the high water heights observed over the National Tidal Datum Epoch. MLW (Mean Low Water): The average of all the low water heights observed over the National Tidal Datum Epoch. MTL (Mean Tide Level): The average of the mean high water and mean low water heights. DTL (Diurnal Tide Level): The average of the high and low waters over a 24-hour period for locations that experience one high and one low tide each tidal day. GT (Great Diurnal Range): The difference in height between Mean Higher High Water and Mean Lower Low Water. MN (Mean Range of Tide): The difference between the mean high water and mean low water. DHQ (Diurnal High Water Inequality): The difference in height between the higher high waters and lower high waters of each day in areas with diurnal tides. DLQ (Diurnal Low Water Inequality): The difference in height between the lower low waters and higher low waters of each day in areas with diurnal tides. Currently, tides are displayed using MSL (Mean Sea Level) format. It has been reported that that is not the universal format to show tides which is why I will add an option to tide modules allowing to choose from the following tidal datums: MSL (Mean Sea Level): The average sea level. The height of the sea surface averaged over a period of time (such as a month or a year), and over all stages of the tide. Used as a reference for elevations on land. LAT (Lowest Astronomical Tide): The lowest tide level possible under average meteorological conditions and under any combination of astronomical conditions. HAT (Highest Astronomical Tide): The highest tide level possible under average meteorological conditions and under any combination of astronomical conditions. MLLW (Mean Lower Low Water): The average of the lower low water height of each tidal day observed over the National Tidal Datum Epoch. MHHW (Mean Higher High Water): The average of the higher high water height of each tidal day observed over the National Tidal Datum Epoch. MHW (Mean High Water): The average of all the high water heights observed over the National Tidal Datum Epoch. MLW (Mean Low Water): The average of all the low water heights observed over the National Tidal Datum Epoch. MTL (Mean Tide Level): The average of the mean high water and mean low water heights. DTL (Diurnal Tide Level): The average of the high and low waters over a 24-hour period for locations that experience one high and one low tide each tidal day. GT (Great Diurnal Range): The difference in height between Mean Higher High Water and Mean Lower Low Water. MN (Mean Range of Tide): The difference between the mean high water and mean low water. DHQ (Diurnal High Water Inequality): The difference in height between the higher high waters and lower high waters of each day in areas with diurnal tides. DLQ (Diurnal Low Water Inequality): The difference in height between the lower low waters and higher low waters of each day in areas with diurnal tides. "