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Canadian Chart 1 Symbols, Abbreviations and Terms

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Tides, Currents - Section H

Terms Relating to Tidal Levels

Ref. IHO Symbology Description CHS Symbology
1 Chart Datum, Datum for sounding reduction
2 Lowest Astronomical Tide
3 Highest Astronomical Tide
4 Mean Low Water
5 Mean High Water
6 Mean Sea Level
8 Mean Low Water Springs
9 Mean High Water Springs
10 Mean Low Water Neaps
11 Mean High Water Neaps
12 Mean Lower Low Water
13 Mean Higher High Water
14 Mean Higher Low Water
15 Mean Lower High Water
16 Spring tide
17 Neap tide
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