Built in 2005 and 2010 respectively, the Via Australis (136 passengers in 64 cabins) and Stella Australis (210 passengers in 100 cabins) feature comfortable cabins all with panoramic windows, private baths, individual climate controls, and safety box. All cabins are 161 sq ft and feature either 1 large double bed or 2 lower twin beds. Two comfortable lounges accommodate naturalist talks and gatherings, while the spacious open air terrace on the uppermost Darwin deck presents the spectacular Patagonian scenery in all its splendor. The vessels also accommodate an infirmary, gift shop, game room, and library. The Stella features a gym.
The vessels were built according to SOLAS 2005 and MARPOL 73/78 updated standards for worldwide oceanic navigation. The International Maritime Organization has issued their Safety Management Certification, guaranteeing international safety standards as well as high standards of environmental protection. Mare Australis features echo sounder, radar, GPS and integration with the Global Maritime Distress and Safety System. There are emergency generators, fire stations, smoke detectors in each cabin, and a sprinkler fire suppression system throughout the ships.