Canadian 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)