What must a vessel using a Traffic Separation Scheme (TSS) do while navigating?

A vessel navigating in a Traffic Separation Scheme (TSS) is required to proceed in the correct traffic lane in the direction of flow. This regulation is in place to enhance safety and organization in busy maritime areas. A TSS is designed to separate opposing streams of traffic to minimize the risk of collisions. By adhering to the designated lanes and following the directional flow, vessels can maintain order and reduce confusion among numerous ships navigating closely together.

The other choices involve practices that contravene safety protocols established for TSS. Crossing lanes freely is hazardous, as it increases the likelihood of collisions with other vessels. Exiting the scheme at any point can disrupt the structured flow of traffic and lead to dangerous situations. Anchoring within the TSS is also inadvisable, as it obstructs normal navigation and can create hazards for vessels that are following the designated traffic flows. Therefore, following the correct route in a TSS is essential for safe navigation at sea.