33 Navigation and Navigable Waters 1 2006-07-01 2006-07-01 false Signalling for contiguous drawbridges. 117.17 Section 117.17 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES DRAWBRIDGE OPERATION REGULATIONS General Requirements
ยง 117.17 Signalling for contiguous drawbridges.

When a vessel must past two or more drawbridges close together, the opening signal is given for the first bridge. After acknowledgment from the first bridge that it will promptly open, the opening signal is given for the second bridge, and so on until all bridges that the vessel must pass have been given the opening signal and have acknowledged that they will open promptly.