🔍 Key Concepts

• Vessel Traffic Services (VTS) and how they manage traffic flow • The formal IMO term for organized lane systems that separate opposing streams of traffic • Where such systems are commonly established (e.g., busy straits and approaches to major ports)

💭 Think About

• Which option specifically refers to a structured system of inbound and outbound lanes rather than just a reporting or communication system? • Think about what term is used on charts to show lane arrangements, separation zones, and precautionary areas in congested waters. • Which term is recognized in the COLREGS/Navigation Rules as a defined routing measure with specific rules for complying vessels?

✅ Before You Answer

• Confirm which choice is an official term used in the COLREGS/Navigation Rules for routing measures. • Check which option describes a lane-based system designed to separate opposing streams of traffic, not just a zone or fairway. • Eliminate any answer that mainly involves reporting, communication, or just a general description of a narrow channel without defined traffic lanes.