I may recall this incorrectly, but it seems to me that the only Radisson ship that has "pod propulsion" is the Voyager, while the Mariner has the traditional set up. I also seem to recall that the pod system on the Voyager is not the Mermaid system, but a similar competing system.
🚢 Cruise with your favorite Keene Luxury Travel Staff Member! 💰 5% KLT Reward plus Shipboard Credit available (amount varies per voyage)! 💲 Offering Enhanced KLT Rewards on voyages hosted by Ngaire & Clay!