Proportionally the sail-by cruises offer more seats to the white continent, but the issue with these is that they are prohibited from making any shore-landings, hence their moniker sail-by. Ships under 200 passengers can disembark their entire passenger load at landing points subject to the IAATO rules. Ones above that and with a clearance can also do landings, but still subject to the 200 person cap. For that reason, expedition ships above 200 passengers often organize a lottery to determine landing orders and do not guarantee that every guest will get to go on them due to weather and other time constraints. Hurtigruten and Viking's vessels are part of those.

In the sub-200 passengers segment but still offering a significant amount of capacity to Antarctica we can count on Ponant, Quark Expeditions, Atlas Ocean Voyages, Silversea, Albatros Expeditions and Oceanwide Expeditions. There are other providers, but they would be considered more boutique due to their lower availability of Antarctica cabins, often due to splitting their time between the 7th continent and other cruise destinations during the November to March short Antarctic season.