Chart No. 1 · L 30.1
Submarine cable
Areas & limits
A wavy magenta line snaking across the seabed — do not anchor or trawl anywhere near it.
What it means
A continuous wavy magenta line traces a submarine cable (telecom or power). A dashed wavy line with cable symbols bounds a submarine cable area (L 30.2).
Why it matters
Fouling a power cable can be lethal as well as expensive — if your anchor snags near a charted cable, slip and buoy the rode rather than winching up. Anchoring in cable areas is often prohibited outright.