VERTICAL REFERENCE SYSTEM Depths and heights are in meters referred to Baltic Sea Chart Datum BSCD 2000 (LAS07). Recalculating the depths and heights from the Baltic Sea Chart Datum 2000 (BSCD2000, national realization LAS07) into the Mean Sea Level of the Baltic Height System (BHS77), the charted depth values must be increased by 1.13 metres (+13 cm), while the heigfht values must be reduced by 0.13 metres (-13 cm).