Examples

The sea level from the Tide Tables May 14 1999 at Halifax are shown in table 2.

May 14 1999 9:00 ADT (the time you want to know the currents).
- Convert to AST -- 8:00 (this corresponds to about one hour after high tide).
- The charts of interest are: Figures 2 and 14.
- Currents will first be scaled according to their length relative to the 5 cm scale arrow on the figure.
- The tidal range is 1.8 - 0.2 = 1.6 so the scale factor to be applied to the currents is 1.6/1.24 = 1.3.
May 14 1999 20:05 ADT.
- Convert to AST -- 19:05 (this corresponds to high tide).
- The charts of interest are: Figures 1 and 13.
- Currents will first be scaled according to their length relative to the 5 cm scale arrow on the figure.
- The tidal range is 2.0 - 0.2 = 1.8 so the scale factor to be applied to the currents is 1.8/1.24 = 1.3.

Table 2: Extraction from Tide Tables -- Halifax Harbour May 14 1999.