Poseidon Expeditions
M/V Sea Spirit · 114 passengersFounded in 1999, Poseidon Expeditions has spent 27 years refining what a small-ship polar expedition should be. M/V Sea Spirit carries just 114 guests, meaning all passengers can go ashore simultaneously — no rotation groups, no waiting. The expedition team comprises naturalists, marine biologists, geologists, and historians; their knowledge of South Georgia's Shackleton legacy and king penguin colonies at St Andrews Bay is unmatched. Average shore time of 2.5 hours per day exceeds most competitors. AECO-certified, IAATO member since 2011, winner of International Travel Awards Best Polar Expedition Cruise Operator four consecutive years (2022–2025).