-

Study of tide is one of the most important needs for scientists, engineers, port managers etc. Persian Gulf is one of the most important regions for transporting oil in the entire world.
Harmonic analyses is one of the best methods used for analyzing of tide and the least square method is the best one for it. IOS is a tidal package that uses least square method.
In this paper, we investigate the accuracy of IOS tidal package. For this reason, we perform numerical experiments with different lengths of records to determine sensitivity of tidal prediction results to these lengths. We also perform numerical examinations with gaps in data.
Results of 25 tests performed in this regard show that if data recording is performed under the calm wave conditions, the accuracy of tidal predictions considerably increases with increase in length of data. However, predictions can be carried out with acceptable accuracy, using even 15 days of hourly data.