In Ghosts of Saltmarsh, how do the players obtain a ship?


In Ghosts of Saltmarsh, there is a lot of information about ships, naval combat, and the sea in general. However, I can’t find any information on how to get a ship in the first place. I want to run this adventure compilation, and I don’t want to have to sideline the game for 30 minutes to find out how to get a ship in the first place. Could someone please explain how my players can get a ship?