Term
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Definition
| Areas of sand and mud, patches or gravel |
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
| Depth cleared by wire drag sweep or diver |
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Term
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Definition
| Safe clearance depth. Depth unknown, but considered to have a safe clearance to the depth shown |
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Term
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Definition
| Rock (islet) which does not cover, height above height datum |
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Term
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Definition
| Rock which covers and uncovers, with height above chart datum where known |
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Term
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Definition
| Rock awash at chart datum |
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Term
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Definition
| Underwater rock of unknown depth, dangerous to surface navigation |
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Term
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Definition
| Underwater rock of known depth, not dangerous to surface navigation |
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Term
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Definition
| Coral reef which is always covered |
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Term
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Definition
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Term
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Definition
| Wreck, hull always dry + covers and uncovers |
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Term
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Definition
| Submerged wreck, depth known/unknown |
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Term
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Definition
| Wreck showing any portion of hull or superstructure at level of chart datum |
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Term
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Definition
| Wreck of which only the mast or masts are visible at chart datum |
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Term
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Definition
| Wreck, least depth obtained by sounding |
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Term
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Definition
| Wreck, least depth obtained by wire sweep or diver |
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Term
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Definition
| Wreck, least depth unknown, but considered to have a safe clearance to depth shown |
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Term
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Definition
| Obstruction, depth and nature unknown |
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Term
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Definition
| Obstruction, least depth known by sounding/wire sweep or diver |
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