Are vessels allowed to cross to the opposite side of a narrow channel at any time?

In the context of navigating narrow channels, vessels are indeed restricted in their ability to cross to the opposite side. The primary concern in narrow channels is to ensure safe passage for all vessels, including larger ships that may be constrained in their ability to maneuver. The International Regulations for Preventing Collisions at Sea (COLREGs) emphasize the need for vessels to navigate in a manner that avoids obstruction to other vessels.

In this case, crossing to the opposite side of a narrow channel at any time is prohibited because it could interfere with the passage of vessels that are constrained by their draft or other navigation limitations. This rule helps maintain order in busy waterways, as it reduces the risk of collisions and allows vessels to operate safely within their designated channels.

While there may be specific situations, such as emergencies or when the channel is clear, where a vessel might consider crossing, these actions still require careful judgment and adherence to safety protocols. However, a general prohibition exists to protect navigation in these narrow, often congested environments.