Canadian Chart 1 Symbols, Abbreviations and Terms

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Rocks, Wrecks, Obstructions - Section K

Obstructions and Aquaculture

Ref.	IHO Symbology	Description	CHS Symbology
40		Obstruction, depth unknown
41		Obstruction, least depth known by sounding only
42		Obstruction, least depth known, swept by wire drag or diver
43.1		Stumps of posts or piles, wholly submerged
43.2		Submerged pile, stake, snag or stump (with exact position known)
44.1		Fishing stakes
44.2		Fish trap, Fish weirs, Tunny nets
45		Fish trap area, tunny nets area
46.1		Fish haven
46.2		Fish haven with minimum depth
47		Shellfish beds with no obstructions
48.1		Marine farm (on largescale charts)
48.2		Marine farm (on smallscale charts)