Today's flag is: Charlie
As a letter of the alphabet, that is the letter C. As a message, it means:
Yes (affirmative or “The significance of the previous group should be read in the affirmative”).
boof (OP) triple-posted this 1 year ago, 2 days later, 4 days after the original post[^][v]#1,331,691
The declassified NATO information for flag Charlie:
indication: AFFIRMATIVE
normally displayed: Where best seen.
a. In reply to a signal: meaning: YES or PERMISSION GRANTED.
b. Preceding 4 or 6 numerals: meaning: With reference to message indicated, YES or PERMISSION GRANTED.
c. C TACK ___ (signal): meaning: YES or PERMISSION GRANTED to carry out the meaning of the signal.
note TACK means tackline, a short piece of line used to separate flags in a signal hoist