<p>Every four years the Racing Rules of Sailing are updated following the Olympics. To help the sailor, World Sailing labels important changes with marginal markings. For the new rules coming into force on 1st January 2025 there are quite a lot of marginal markings: - A third of the Definitions are marked, including Sail the Course, Mark-Room, Obstruction and Continuing Obstruction; - Nearly a third of the rules in Part 2 (When Boats Meet) are ma...