When cruise ships stop being cruise ships: What to do next

The U.S. Department of Transportation is expected to begin a review of the cabins on the two cruise ships that have operated for more than a decade, the most expensive in the world.

The Coast Guard says the vessels, the USS Arizona and the USS Portland, have been in service since 2010 and are no longer required to have a security presence.

The move is meant to ease the pressure on passengers and crew.

A spokeswoman for the Transportation Department said the review is ongoing.

In January, the U.K. and Canada’s Royal Canadian Navy announced that they would stop their long-standing practice of using armed guards aboard their ships, saying it was time to move to new standards for protecting ship passengers and crews.

That announcement was a significant shift from previous decades, when ships regularly relied on armed guards to prevent a hostage situation or a hijacking.