Fairway - Navigable part of a waterway

Fairway speed - Mandatory speed in a fairway

ITZ Inshore Traffic Zone (of a TSS) - A routing measure comprising a designated area between the landward boundary of a TSS and the adjacent coast

Manoeuvring speed - A vessel’s reduced speed in circumstances where it may be required to use the engines at short notice

Receiving point - A mark or place at which a vessel comes under the obligatory entry, transit, or escort procedure

Reference line - A line displayed on the radar screens in VTS Centres and/or electronic sea charts separating the fairway for inbound and outbound vessels so that they can safely pass each other

Reporting point - A mark or position at which a vessel is required to report to the local VTS Station to establish its position

Separation zone/line - A zone or line separating the traffic lanes in which vessels are proceeding in opposite or nearly opposite directions; or separating a traffic lane from the adjacent sea area; or separating traffic lanes designated for particular classes of vessels proceeding in the same direction

Traffic clearance - VTS authorization for a vessel to proceed under conditions specified

Traffic lane - An area within defined limits in which one-way traffic is established

TSS - Traffic Separation Scheme: a routeing measure aimed at the separation of opposing streams of traffic by appropriate means and by the establishment of traffic lanes

VTS - Vessel Traffic Services: services designed to improve the safety and efficiency of vessel traffic and to protect the environment

VTS area - Area controlled by a VTS Centre or VTS Station