INT 1 · K 28
Dangerous wreck
DangersCore
The wreck ribs inside a dotted danger surround mark a wreck dangerous to surface navigation.
What it means
A horizontal wreck line crossed by three ribs and enclosed by a tight dotted surround marks a wreck considered dangerous to surface navigation.
Why it matters
The surround is symbolic rather than a measured keep-out radius. Determine a safe passing distance from chart scale, depths, survey quality, and conditions.