Carnival Corp., bowing to pressure from U.S. Senator Jay Rockefeller, said it will reimburse the U.S. for costs related to the breakdowns at sea of its Triumph and Splendor cruise ships.

“Although no agencies have requested remuneration, the company has made the decision to voluntarily provide reimbursement to the federal government,” Miami-based Carnival said in an e-mailed statement today.

Rockefeller, a West Virginia Democrat who heads the Senate Committee on Commerce, Science and Transportation, asked Carnival Chairman and Chief Executive Officer Micky Arison in a March 14 letter whether the cruise line intended to reimburse the Coast Guard and Navy for expenses responding to an engine room fire on the Triumph and a similar incident on the Splendor in November 2010.

The Triumph had to be towed to port in Mobile, Alabama, without its main power source, leaving 3,100 passengers with limited food and toilet service for several days. In the letter, Rockefeller said the Coast Guard spent $780,000 on the Triumph incident and $1.54 million responding to the Splendor. The Navy spent $1.88 million on the Splendor.

Carnival, the world’s largest cruise line operator, fell 2.8 percent to $33.17 at the close in New York. The shares have declined 9.8 percent this year.

Editors: Anthony Palazzo, Rob Golum. To contact the reporter on this story: Christopher Palmeri in Los Angeles at cpalmeri1@bloomberg.net. To contact the editor responsible for this story: Anthony Palazzo at apalazzo@bloomberg.net. 

Photo Credit: A small boat from the U.S. Coast Guard Cutter Vigorous patrols near the cruise ship Carnival Triumph in the Gulf of Mexico, in this February 11, 2013 handout photo. Paul McConnell