PHILIPSBURG, St. Maarten — Laura Dekker set a steady foot aboard a dock in St. Maarten on Saturday, ending a yearlong voyage aboard a sailboat named “Guppy” that apparently made her the youngest person ever to sail alone around the globe.

Dozens of people jumped and cheered as Dekker waved, wept and then walked across the dock with her mother, father, sister and grandparents, who had greeted her at sea earlier.

Dekker arrived in St. Maarten after struggling against high seas and heavy winds on a final, 41-day leg from Cape Town, South Africa.

Dekker claims she is the youngest sailor to complete a round-the-world voyage, but Guinness World Records and the World Sailing Speed Record Council did not verify the claim, saying they no longer recognize records for youngest sailors to discourage dangerous attempts.