Where are vessels typically allowed to fish in a narrow channel?

Vessels are typically allowed to fish in the deepest part of a narrow channel because this area is likely to provide the safest navigational conditions. The deepest part minimizes the risk of grounding and is usually where the channel's buoyage system is focused, ensuring vessels are operating in the most navigable waters. By fishing in this designated area, vessels can also avoid interfering with the transit of other vessels that may need to navigate through the narrow channel, thereby promoting safety and efficiency.

Fishing in any part of the channel could lead to congestion and possible collisions with passing vessels, while restricting fishing to only the port or starboard side would not provide a practical or safe solution. The COLREGs explicitly emphasize maintaining navigational safety in constrained waters, and using the deepest portion aids in achieving this objective.