Crystal Cruises' new Diamond Class ship

(2:20 p.m. EDT) -- Luxury line Crystal has revealed the first tidbits of information about its new Diamond-Class ships, including renderings of the exterior design. The ships will be built by the MV Werften shipyard in Stralsund, Germany.

The first ship is scheduled to debut in 2022. It will carry approximately 800 passengers and measure 67,000 gross tons. That puts the new ship at a similar tonnage to the 68,000-ton Crystal Serenity, but with fewer passengers; Serenity will carry 980 passengers (down from 1,070) after its fall 2018 refurbishment, when new penthouses and penthouse suites are added. Crystal Symphony measures 50,000 tons and carries 848 passengers.

"Our ocean ships are the heart of the Crystal brand and have been loved by our guests for more than 28 years," Tom Wolber, Crystal Cruises president and CEO, said in a company statement. "We are delighted to expand this celebrated fleet with amenities and spaces that our guests have come to love along with more choices and new experiences that will take luxury to the next level."

The Diamond-Class ships will be the first new builds in Crystal's classic ocean cruise fleet since Crystal Serenity debuted in 2003. The line's river cruise arm has debuted four new-builds in 2017 and 2018, and a brand-new expedition yacht, Crystal Endeavor, will launch in 2020.

--by Erica Silverstein, Senior Editor