If you look up the word crew in Webster's Dictionary, you will find several definitions. One is "a group of people working together." Another, however, gives us a better visual definition: "a team of rowers."
The sport called crew is an Olympic event. If you have ever witnessed a live crew event, you are immediately impressed with the coordination, leadership, positioning, and skill needed to bring a group of individuals together into a single rhythm. One member of the team who is just a split second early or late can take the entire boat off course.