The Inland Rules specify that any vessel under 50 meters (164.1') at anchor must exhibit a white 360-degree light where it can be seen and have a two-mile visibility in most situations. Vessels less than 7 meters (23.9') must display anchor lights when anchored in or near a narrow channel, fairway, or anchorage, or where other vessels normally navigate.

A 360-degree white all-around light with two-mile visibility fulfills this requirement. Wire gauge and length of wiring, as well as battery condition, can affect a light's performance. Follow manufacturer's instructions to ensure compliance with U.S. Coast Guard regulations.