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[MissMarple]

Originally Posted by searage

Indeed they are the only way to raise it, and indeed they have been broken or nerfed something fierce lately.

You may also raise your sailing level by having the helm when your "crew" is sinking ships. In fact this is a much faster method...for every ship that is sunk you get a commensurate amount of sailing points. So ask friends and/or strangers to sail with you.