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. Up to three landings or activities per day, each lasting 2.5 hours, far exceeding most competitors. AECO-certified, IAATO member since 2011, winner of International Travel Awards Best Polar Expedition Cruise Operator four consecutive years (2022–2025).