If only someone had explained that they disagree with
@Vixen's claim that her figure of "15-18 knots" is "clearly stated" within
the diagram, we could have avoided all of the subsequent posts in which
@Vixen continued to insist her figure of 15-18 knots came directly from that diagram.
The sentence I highlighted establishes a context in which
@Vixen is talking about wind speed. Neither that sentence nor the sentences that precede it say anything at all about the speed of the boat.
From that context, we should have inferred that
@Vixen knows full well that 18 m/s is not 18 knots.
I suspect they were saying that because 'S = 18' isn't on the diagram.
How could anyone fail to be convinced by such plausible and well-evidenced claims to qualifications, expertise, academic degrees, probabilities, infallibility, and (my favorite) laziness ("zero chance that I would bother to calculate")?
Especially when anyone who doubts those claims can test them against the archives of this and other threads.
I should ask my pilot friend whether he's ever heard of anyone stating a wind speed in knots.