This topic was discussed in 3 parts as part of  the ILA virtual training program with Cxema Pico in April/May 2021 World Sailing International Judge and Umpire, Cxema Pico presents a three-part racing rules series  Racing Rules I – The Basics and More – WATCH RECORDING Racing Rules II – Windward & Leeward Marks – WATCH RECORDING Racing Rules III – Rules 15, 16, 17, 42 – WATCH RECORDING