NEW YORK (Bloomberg) — Royal Caribbean Cruises Ltd., the world's second-largest cruise-ship operator, said broken propellers forced the company to give out refunds on a European trip, costing it 4 cents a share in earnings.The Celebrity Millennium's propellers hit a submerged rock while the ship was anchored off of Villefranche, France, on July 2. The trip's itinerary was "significantly altered" for repairs, and passengers will receive full refunds, Miami-based Royal Caribbean said on Friday in a statement.

The company in May forecast second-quarter profit of 59 cents to 63 cents a share. The average estimate of analysts surveyed by Bloomberg is 59 cents. Royal Caribbean didn't say when it will record the costs.

The Celebrity Millennium left Barcelona, Spain, on June 30 for a 12-night Mediterranean voyage ending in Venice, Italy, on July 12. The propellers hit the rock following an electrical malfunction.

The ship cancelled a July 3 stop in Livorno, Italy and sailed to Civitavecchia, Italy, for repairs. The ship will stay there until tomorrow, forgoing stops in Naples, Italy, and Santorini and Athens in Greece. The ship can carry more than 2,000 passengers.

Shares of Royal Caribbean rose 4 cents to $42.69 on Friday in New York Stock Exchange composite trading.

The stock has climbed the 3.2 percent this year.

The company operates about 35 ships under the Royal Caribbean International, Celebrity Cruises, Pullmantur and Azamara Cruises lines. Carnival Corp. is the world's largest cruise operator.