INT 1 · K 31
Foul ground
DangersCore
A hash-like mark or Foul legend warns that bottom gear can snag.
What it means
Foul ground contains debris or remains that are not charted as a danger to ordinary surface navigation but can foul anchors, fishing gear, or a vessel taking the ground.
Why it matters
Check the surrounding depths before crossing; 'not dangerous to surface navigation' is not a guarantee for every draught or sea condition.