Variation of Tidal Range Based on Hijra Calendar And Its Relation With Ethno-Oceanography of the Sama Tribe in Eastern Indonesia

Based on Ethno–Oceanography of the Sama tribe in Eastern Indonesia, they measured and determined tidal range when Sha’ban taking place. Why do they do perform measurements other Hijra month? The questions and objective of this study were intended to respond the scientific fundamental of Ethno-Oceanography of the Sama tribe, by way of comparing the tidal range in Sha’ban with other month. The determination of tidal range using amplitude value of tidal constituents in accordance with the empirical equation from the Intergovernmental Committee of Surveying and Mapping - Permanent Committee on Tides and Mean Sea Level (ICSM PCTMSL). Determination of tidal constituent value (amplitude) used the T-Tide. The difference of tidal range upon each month of Hijra is calculated in statistical (Two way - ANOVA). Analysis results showed that the tidal range at Sha’ban was higher and the deviation was lower than the other months, other than that the diurnal constituent (M2, S2 and K2) in Sha ban has maximum amplitude, Moreover, ANOVA results showed that Sya’ban was significantly different (P 0.05) on Highest High Water Level (HHWL) throughout Hijra month.