What is Mr arrows problem? How does the crew respond?

Apparently, the first significant thing that happened on the trip was that the first mate, Mr. Arrow, was useless because he was always drunk. One night, he disappeared, most probably, having fallen over the side of the ship when he was drunk. As a consequence of his absence, many people have taken over his job, including the boatswain, Job Anderson, Mr. Trelawney, who took a watch (but only in good weather), and the coxswain, Israel Hands, an experienced seaman and a close friend of Long John Silver.