You are approaching a narrow channel. Another vessel in the channel can only be navigated safely in that channel. You should __________.

When navigating near a narrow channel where another vessel is already present and can only operate safely within that channel, it is essential to prioritize the safety and navigation of all vessels involved. Therefore, the correct action is to refrain from crossing the channel if it may impede the other vessel.

This approach aligns with the "Rules of the Road," which emphasize the importance of avoiding actions that would hinder another vessel's ability to navigate safely, particularly in a constrained area. The fundamental principle is to ensure that the safety and passage of the vessel already in the channel are preserved, preventing potential collisions or dangerous situations.

Furthermore, crossing the channel quickly or increasing your speed could create hazardous conditions, potentially leading to accidents. Signaling your intentions is certainly a good practice, but it doesn’t address the primary concern of preventing interference with the vessel that is restricted in its ability to maneuver. Thus, being cautious and ensuring that you do not impede the other vessel's navigation is the most responsible choice.