Carnival Splendor exterior

(3:35 p.m. EDT) -- After nearly a year of successful results, Carnival Cruise Line has revealed more ships will go keyless for embarkation. The program kicked off on Carnival Splendor last fall and has since been added to Carnival Glory, Carnival Sensation, Carnival Vista and Carnival Victory.

The keyless embarkation process involves placing Sail & Sign cards (Carnival key cards) in a sealed envelope, which is left in the mailbox outside the cabin. Cabin doors remain locked until the passenger is able to retrieve their key -- typically around 1:30 p.m., unless they are part of the VIFP club or purchased the line's Faster to the Fun package. This eliminates the extra step of having your key card issued in the cruise terminal.

Passengers can continue to purchase food and beverages while they wait for their key card, by using their name and cabin number.

A spokesperson for Carnival said, "The program has been working extremely well and will continue to roll out to other ships over time."

Carnival Freedom is scheduled to adopt the process this weekend.

--By Gina Kramer, Editor