Complex sentence: The first mate is more forthcoming and admits that many of the crew asked for pay advances during the trip-he believed that they may have been gambling but Bunk sees that they may have been spending it on the girls.
Split into simpler sentences: The first mate is more forthcoming and admits that many of the crew asked for pay advances during the trip. He believed that they may have been gambling, but Bunk thinks that they may have been spending it on the girls.