Chart 1 : Symbols, Abbreviations and Terms

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Depths - Section I

SNS a,b

Soundings

Ref. IHO Symbology Description CHS Symbology
10 Sounding in true position
11 Sounding out of position
12 Least depth in narrow channel
13 No bottom found at depth shown
14 Soundings which are unreliable or taken from smaller scale source
15 Drying heights above chart datum
Sondes découvrantes audessus du zéro des cartes
16 Natural watercourse (in intertidal area)
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