Chart 1 : Symbols, Abbreviations and Terms

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Rocks, Wrecks, Obstructions - Section K

Rocks

Ref. IHO Symbology Description CHS Symbology
10 Rock (islet) which does not cover, height above the plane of reference for elevations
11 Rock which covers and uncovers, with height known or unknown above chart datum
12 Rock awash at chart datum
13 Underwater rock of unknown depth, dangerous to surface navigation
14 Underwater rock of known depth
14.1 - inside the corresponding depth area
14.2 - outside the corresponding depth area, dangerous to surface navigation
15 Underwater rock of known depth, not dangerous to surface navigation
16 Submerged coral reef
17 Breakers
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