33 C.F.R. § 118.55 – Periods of operation. | Midpage- (a) Lights shall be displayed from sunset to sunrise and at other times when the visibility is less than one mile.
- (b) Operators shall not be required to exhibit the prescribed lights during seasons when vessels are unable to navigate in the vicinity of the bridge.
- (c) The operation of signals other than lights shall be as prescribed by the District Commander. Each case shall be considered individually.