INMARSAT and Iridium Phones:
You should read the entire extract that applies to your race (again, generally Category 1 Monohulls), whether or not it actually addresses items that you’ll be responsible for carrying. There’s some really good content in the Fundamentals and Definitions (Section 1) as well as the definitions of what each Category means (Section 2). The “gear”sections are 3-5, with a final section on training (Section 6). Also, read the appendices that apply to your race, especially Appendix C, which describes one method of inspecting a boat for offshore racing.