Princess Cruises said three more ships will be equipped to use the Ocean Medallion wearable device, starting with the Golden Princess and Crown Princess in November 2018.

They will be followed by the Ruby Princess in January 2019.

The Bluetooth-enabled Ocean Medallion, which can be worn as a wristband or pendant, will enable guests to enter their stateroom and pay for onboard purchases. But that just scratches the surface of its promised capabilities.

When used in tandem with the Ocean Compass app, the Medallion will offer location-based services, enabling parents to know where their kids are located on the ship via their Medallions.

The technology also is a digital concierge. After guests establish a profile, they will be sent suggestions and invitations to events and activities onboard and ashore based on their preferences indicated in the profile.

Further, guests will be able use the app and Medallion to order a drink and have it delivered to them poolside, or wherever they happen to be on the ship. The Medallion also will enable guests to play interactive games at "ocean portals" found throughout the ship.

The first ship to use the Ocean Medallion will be the Regal Princess, on a Nov. 12 cruise from Fort Lauderdale. The ship already has been wired for the technology, as has the Caribbean Princess, Royal Princess and Island Princess.

The cruise line plans to eventually equip all of its ships with Ocean Medallion capability.

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