Chart 1 : Symbols, Abbreviations and Terms

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Depths - Section I

Depths in Fairways and Areas

Ref. IHO Symbology Description CHS Symbology
20 Limit of dredged area Limite de zone draguée
21 Dredged channel or area with depth of dredging Zone ou chenal dragué avec la profondeur du dragage
22 Dredged channel or area with depth of dredging and year of latest survey Zone ou chenal dragué, avec l'indication de la profondeur et l'année du dernier levé
23 Dredged channel or area with maintained depth Chenal ou zone dragué avec la profondeur entretenue
24 Depth at chart datum, to which an area has been swept by wire drag. The latest date of sweeping may be shown in parentheses
25 Unsurveyed or inadequately surveyed area; area with inadequate depth information
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