The Antarctic Explorer via Buenos Aires is offered on the Ultramarine which is a Polar Adventure Ship. Polar Adventure Ships These are small ice rated vessels well qualified for Polar waters. Intimate adventures are always more enjoyable with like-minded passengers and staff, so these voyages are for people who like flexible itineraries and plenty to keep them busy. Activities include frequent Zodiac excursions, trekking and many hours on deck in areas that other ships only dream about accessing. Food and staff are superb and every guest benefits from the technical advances of this superb fleet. Rest assured our Polar Adventure Ships enable any traveller to maximize their experience sensitively in the Poles.