Aren't these "announcements" required to be in the sailing instructions or posted on the notification board by the time listed in the SI's for postings?
Generally, yes. Sailing instructions must be written (RRS 89.2a). Oral changes to the sailing instructions are allowed only on the water, and only if the sailing instructions describe the process for doing so (RRS 89.2c).
Announcements at the competitors' meeting cannot change the sailing instructions. Changes must either be written and posted (according to RRS 89.2c) or communicated on the water (again, according to RRS 89.2c).
Note, however, that some class rules (such as high school racing) modify RRS 89.2 to allow announcements at the competitors' meeting.
Regards,
Eric
