Code of Federal Regulations Title 33. Navigation and Navigable Waters § 33.209.310 Representation of submarine cables and pipelines on nautical charts

(1) Within protected waters such as harbors, rivers, bays, estuaries or other inland waterways the location of submarine cables and pipelines is to be indicated by shaded areas marked “Pipeline area” or “Cable area”. The extent of the limits of the area will be governed by local conditions but shall include the immediate area which overlies the cable or pipeline.

(2) Ordinarily, the shaded area on a chart which depicts a cable area or pipeline area should not exceed 500 feet on each side of the location of the cable or pipeline except on small scale charts where an area of that width would not be of sufficient prominence.

(3) The shaded area will be designated “cable area” or “pipeline area” as appropriate, but no other information as to the character or ownership of the installation will appear on the chart.