In the past three issues, we have been doing an overview of the right-of-way rules. In the first, we did a review of Section A of Part 2 of the Racing Rules of Sailing. In the second we did a review of the definitions, in the third we did a review of Section B of Part 2. This issue, we will look at Section C of Part 2, Marks and Obstructions. Many of my articles over the past 22 years have covered rules in this section, but this is the most involved and complicated part of right-of-way rules, so I will only provide an overview in this issue. Even reprinting all of Section C would make the article too long, so I have only reprinted the headings and introductions.