33 C.F.R. § 118.150 Traveller platforms.
Title 33 - Navigation and Navigable Waters
The District Commander may require under deck traveller platforms which may significantly reduce the vertical clearance when operated over navigation channels at night to be lighted with quick flashing red lights on each of the four lower corners. [CGD 84–022, 51 FR 16314, May 2, 1986]
Title 33: Navigation and Navigable Waters
PART 118—BRIDGE LIGHTING AND OTHER SIGNALS
§ 118.150 Traveller platforms.

