Emerald Sky is the first of a fleet of "Star Ships" ships launched by Emerald Waterways, a European river cruise line that made its debut as part of Australian-owned parent company Scenic Tours, which also boasts all-inclusive brand, Scenic Cruises.

It marks an exciting departure from existing vessels, with an exceptionally bright, modern look and a unique new-to-river feature: a swimming pool with a retractable roof that transforms into a cinema at night. The three airy passenger decks pack in plenty of other facilities, including a hair salon, gym, massage room and bikes that passengers can use to explore independently. Some initial issues with the ship — such as an extremely steep staircase onboard — were fixed in the months following its launch.

Between March and November, Sky sails on three Rhine-Main-Danube itineraries that range in duration from eight to 15 days.

This fresh-looking line has broken the traditional mold of river cruising and will appeal to people looking for moderately priced cruises, as well as younger cruisers and first-time passengers dipping a toe into this burgeoning sector of the cruise market.