M 

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Tracks, Routes

SNS b

Tracks

Ref.	IHO Symbology	Description	CHS Symbology
1		Leading line (solid line is the track to be followed; ‡ means "in line")
2		Transit, Clearing line
3		Recommended track based on a system of fixed marks
4		Recommended track not based on a system of fixed marks
5.1		One-way track (and DW track) based on a system of fixed marks
5.2		One-way track (and DW track) not based on a system of fixed marks
6		Recommended track with maximum authorized draft stated