The latest addition to Silversea’s fleet, the Silver Endeavour, is an “ice-strengthened mega yacht” and the fifth expedition ship in the company’s 13-vessel fleet. Launched in 2021, it was originally built for Crystal Cruises but was acquired by Silversea for $275 million early in 2022 when Crystal went into insolvency. Reconfigured to Silversea’s specifications, its first cruise, in Antarctica, will be this November. Next summer will see it transfer to the Arctic. Slightly bigger than most expedition vessels, the 20,450-ton Endeavour has a 1-to-1 staff-to-guest ratio and accommodations for 200 passengers. These range from 355-square-foot Classic Veranda Suites to a 1,870-square-foot Owner’s Suite. All will come with butler service.