Cecilia Birkelund and Elisabeth Marzolf developed a friendship because they were wearing the same type water shoes at Little Egg Harbor Yacht Club when they were little girls. Now, seven years later, they spend a lot more of their time together in a boat.

Next week, they will be overseas taking on the world.

“It’s a big step, but it’s not just about sailing,” said Birkelund, one half of the 14-year-old duo who will compete in the RS Feva World Championships in Travemunde, Germany starting Monday,…