33 C.F.R. § 117.19 Signalling when two or more vessels are approaching a drawbridge.
Title 33 - Navigation and Navigable Waters
When two or more vessels are approaching the same drawbridge at the same time, or nearly the same, time, whether from the same or opposite directions, each vessel shall signal independently for the opening of the draw and the drawtender shall reply in turn to the signal of each vessel. The drawtender need not reply to signals by vessels accumulated at the bridge for passage during a scheduled open period.
Title 33: Navigation and Navigable Waters
PART 117—DRAWBRIDGE OPERATION REGULATIONS
Subpart A—General Requirements
§ 117.19 Signalling when two or more vessels are approaching a drawbridge.
