What is the exact meaning of...?

[size=150]Dear to whom may it concern,
In TOEIC listening part I, set 23, exercise 7, the correct answer is 'Most of the sails are not set’. Would you please tell me what is the exact meaning of set here in this sentence? Is it related to color or arrangement of them?[/size]With the best regard

If the sails are ‘set’ they are up. These sails are furled - they are not raised.

[color=darkblue]Dear Beeesneees,
Thank you very much indeed for your notification.
Sincerely yours