计算潮汐调和常数，潮汐预测,潮流的预测，能够绘制各种预测图与原始图，两者可以进行比对从而得出观测站数据的结论(Computation of tidal harmonic constants, tidal predictions, tidal current predictions, the ability to plot various prediction maps and original maps, and the two can be compared to derive observa