Today's flag is: India
As a letter of the alphabet, that is the letter I. As a message, it means "I am altering my course to port." Another wording is "I am directing my course to port."
boof (OP) triple-posted this 1 year ago, 3 days later, 5 days after the original post[^][v]#1,329,635
The declassified NATO information for flag India:
indication: GOING ALONGSIDE (in port or at anchor)
Normally Displayed: BY RECEIVING SHIP: At yardarm on side rigged.
AT DIP: meaning: I am preparing to receive you alongside.
CLOSE UP: meaning: I am ready to receive you alongside.
HAULED DOWN: meaning: First line is secured.
Normally Displayed: BY SHIP GOING ALONGSIDE: At yardarm on side rigged.
AT DIP: meaning: I am preparing to come alongside you.
CLOSE UP: meaning: I am ready to come alongside you.
HAULED DOWN: meaning: First line is secured.
boof (OP) replied with this 1 year ago, 21 hours later, 6 days after the original post[^][v]#1,329,732
from sailing.org, The Racing Rules of Sailing 2025-2028
Rule 30.1 is in effect.
[the I Flag Rule
If flag I has been displayed, and any part of a boat’s hull is on the course side of the starting line or one of its extensions during the last minute before her starting signal, she shall sail across an extension so that her hull is completely on the pre-start side before she starts.]
as stated at wikipedia:
The Round-an-End Rule 30.1 will be in effect. A boat over the line during the minute before the start must sail to the pre-start side of the line around either end before starting. If they fail to do this they will be scored OCS [On Course Side, which is akin to a false start].