INT 1 · K 29
Non-dangerous wreck
DangersCore
Wreck ribs without a danger surround mark a wreck not considered dangerous to ordinary surface navigation.
What it means
The wreck-ribs mark without a dotted danger surround identifies a wreck assessed as not dangerous to ordinary surface navigation at the chart datum and scale.
Why it matters
It is not necessarily deeper than 20 metres and can still endanger anchoring, fishing, diving, or deep-draught craft.