What does the signal "_" signify in navigational terms?

The signal that indicates "approaching a bend in a channel" plays a crucial role in maritime navigation. This signal is essential for alerting vessels of nearby changes in the river or channel configuration, which can affect navigation, especially when visibility is limited or when there are other vessels in the vicinity. Understanding this signal helps in maintaining safety by allowing mariners to prepare for potential hazards that may arise due to the change in course. Proper application of this signal contributes to effective communication among vessels and enhances the overall safety of maritime operations, particularly in areas where navigation relies heavily on visual cues.