§ 150.720 What are the requirements for sound signals?
Current through Sep 9, 2026 · Read all of Part 150
The sound signal on each pumping platform complex must be operated whenever the visibility in any horizontal direction from the structure is less than 5 miles. If the platform is under construction, this requirement may be met by the use of a 2-second whistle blast, made every 20 seconds by a vessel moored at the platform.