All the data is in Republic of Panama local time (75th Meridian Time). Hours are numbered consecutively, starting from hour 0 (midnight) to hour 23 (11 p.m.). Hour 12 corresponds to noon, and the hours greater than 12 correspond to afternoon and evening.
The tide table is based on the same reference level used for local navigational charts. To find the actual depth at a given time, the user must add the tide height specified in the table and the depth specified in the navigational chart. If the tide height is negative (preceded by a minus sign), it must be subtracted from the depth specified in the chart.
The Panama Canal Pacific Entrance (south) is referenced at the same level used for local marine or navigational charts, corresponding to the tidal plane registered at 2.569m (8.430 feet) below the mean sea level at Balboa, under the 1992-2010 Tidal Datum Epoch. The syzygial tide is the extreme tide that occurs in periods of full and new moons. Based on the mean tide elevations of the 19-year Tidal Datum Epoch, the mean level of syzygial tides (also known as Mean Low Water Springs or MLWS) stands at 2.201m (7.220 feet) under the Panama Canal Precise Level Datum (PLD).
The reference level for tidal forecasting in the Panama Canal Atlantic Entrance (north, Caribbean Sea) at Cristobal, is set at 0.116m (0.380 feet) below the Mean Sea Level (MSL) corresponding to the 1992-2010 Tidal Datum Epoch. Based on the mean tidal elevations for the 19-year Tidal Datum Epoch, ranging from 1992 to 2010, the Mean Low Water (MLW) at Cristobal stands at 0.003m (0.01 feet) above the Panama Canal Precise Level Datum (PLD).