Extended Operational and Trade Vocabulary

Polar Expedition Cruise and IAATO Operations glossary

The polar-expedition-cruise vocabulary: the AECO Arctic operating guidelines and site-specific landing protocols for Svalbard, Greenland, and Jan Mayen, IAATO Antarctic operations, biosecurity and wildlife-distance rules, and the zodiac, landing, and expedition-staff terms. Grounds each term in the AECO or IAATO operating standard it belongs to.

257 defined terms.

Showing 250 on this page (page 1 of 2).

A

AECO: Association of Arctic Expedition Cruise Operators, founded 2003 in Norway as the Arctic counterpart to IAATO with 80+ member operators.
AECO Guidelines: Mandatory operating procedures for member vessels covering wildlife distance, community visits, biosecurity, and cultural heritage in the Arctic.
AECO Member: Tour operator that has signed AECO bylaws and agreed to follow site-specific guidelines across Svalbard, Greenland, and other Arctic regions.
AECO Observer Scheme: Independent observer program embedded on member vessels to audit compliance with AECO operational guidelines.
AECO Site Guidelines: Location-specific landing protocols published by AECO for sensitive Arctic sites in Svalbard, Greenland, and Jan Mayen.
Akademik Ioffe: Russian Academy of Sciences research vessel chartered through the 2010s for polar expedition cruises before withdrawal from the charter market in 2019.
Akademik Sergey Vavilov: Sister ship to Akademik Ioffe, a Russian research vessel chartered by One Ocean Expeditions and others for polar tourism.
Akademik Shokalskiy: Russian ice-strengthened research vessel that became beset in Antarctic ice in December 2013, prompting an international rescue operation.
Albatros Expeditions: Danish polar expedition operator running Antarctic and Arctic itineraries with chartered and owned vessels including Ocean Atlantic and Ocean Albatros.
Aleutian Islands: Volcanic island chain extending from Alaska, an expedition cruise destination noted for seabird colonies and Russian-era heritage sites.
Annex I Madrid Protocol: Environmental Impact Assessment annex requiring prior evaluation of activities in Antarctica based on potential impact.
Annex II Madrid Protocol: Conservation of Antarctic Fauna and Flora annex regulating native species protection and non-native species introduction.
Annex III Madrid Protocol: Waste Disposal and Waste Management annex governing handling and removal of waste from Antarctic operations.
Annex IV Madrid Protocol: Prevention of Marine Pollution annex aligning Antarctic shipping with MARPOL discharge standards.
Annex V Madrid Protocol: Area Protection and Management annex establishing ASPA and ASMA designations within the Antarctic Treaty area.
Annex VI Madrid Protocol: Liability annex addressing environmental emergencies arising from activities in the Antarctic Treaty area.
Antarctic Convergence: Frontal zone where cold Antarctic surface water meets warmer subantarctic water.
Antarctic Fur Seal: Otariid seal (Arctocephalus gazella) abundant on South Georgia and breeding on the South Shetland Islands.
Antarctic Peninsula: Region of frequent IAATO tourist operations and dense ice navigation traffic.
Antarctic Petrel: True Antarctic seabird (Thalassoica antarctica) frequently sighted around pack ice during expedition voyages.
Antarctic Sound: Passage between the tip of the Antarctic Peninsula and the Joinville Island group, often used to access the Weddell Sea.
Antarctic Specially Managed Area: ASMA designation under Annex V of the Madrid Protocol allowing coordinated management of areas with multiple activities.
Antarctic Specially Protected Area: ASPA designation under Annex V of the Madrid Protocol requiring a permit and management plan for entry.
Antarctic Treaty: International agreement signed in Washington on 1 December 1959 reserving the area south of 60 degrees South for peaceful purposes and scientific cooperation.
Antarctic Treaty Consultative Meeting: ATCM, the annual governance forum where Consultative Parties adopt measures, decisions, and resolutions for the Antarctic Treaty area.
Antarctic Treaty System: Collective term for the Antarctic Treaty, the Madrid Protocol, CCAMLR, and related instruments governing activities south of 60 degrees South.
Antarctica21: Chilean fly-cruise operator pioneering Drake Passage air bridges to King George Island using Magellan Discoverer and Magellan Explorer.
Antarpply Expeditions: Argentine polar operator based in Ushuaia running MV Ushuaia for Antarctic Peninsula voyages.
ASMA: Antarctic Specially Managed Area, a Madrid Protocol designation for collaborative management of areas hosting multiple Antarctic activities.
ASPA: Antarctic Specially Protected Area, a Madrid Protocol designation requiring a permit for entry into ecologically or scientifically sensitive zones.
Assistant Expedition Leader: Deputy to the Expedition Leader on a polar expedition ship, supporting landings, logistics, and team coordination.
Atlas Ocean Voyages: Expedition cruise brand operating small polar-capable yachts including World Navigator (2021), World Voyager (2020), World Traveller (2022), and World Seeker (2024).
Aurora Expeditions: Australian polar expedition operator founded in 1991 running Greg Mortimer, Sylvia Earle, and Douglas Mawson.
Australis: Chilean operator running Stella Australis and Ventus Australis in the Chilean fjords and around Cape Horn, sometimes grouped with polar specialists.

B

Bay of Whales: Indentation in the Ross Ice Shelf historically used as a southern access point for Antarctic expeditions.
Beechey Island: Historic Northwest Passage site in Nunavut containing graves of the Franklin Expedition crew, a key cultural landing in Arctic Canada.
Beluga whale: *Delphinapterus leucas*, a small white toothed whale of Arctic and subarctic waters.
Bering Sea: Marginal sea between Alaska and Siberia, hosting major pollock and crab fisheries.
Bering Strait: Narrow passage connecting the Pacific and the Arctic Ocean between Russia and Alaska.
Biosecurity Procedures: Cleaning and decontamination protocols required by IAATO and AECO for boots, clothing, and gear to prevent species transfer.
Blue whale: *Balaenoptera musculus*, the largest animal on Earth.
Boot Wash: Disinfection station for muck boots required between landings under IAATO and AECO biosecurity standards.
Bowhead whale: *Balaena mysticetus*, a large Arctic baleen whale.
Bridge equipment (Polar Code): Requirements in Polar Code Chapter 9 for equipment performance at Polar Service Temperature.
Bridge Open Policy: Operational practice on many expedition ships allowing passengers onto the navigation bridge during transits.

C

C-1 Vessel Category: IAATO category for vessels carrying 200 or fewer passengers and approved for traditional shore landings in Antarctica.
C-2 Vessel Category: IAATO category for vessels carrying 201 to 500 passengers and approved for landings under restricted conditions.
Cambridge Bay: Hamlet on Victoria Island, Nunavut, serving as a key resupply and research hub along the Northwest Passage.
Cape Petrel: Pied seabird (Daption capense) commonly seen following expedition ships across the Southern Ocean.
CCAMLR: Commission for the Conservation of Antarctic Marine Living Resources.
Cheesemans Ecology Safaris: California-based wildlife tour operator chartering ice-class vessels for in-depth South Georgia and Antarctic voyages.
Chinstrap Penguin: Pygoscelid penguin (Pygoscelis antarcticus) distinguished by a narrow black band under the chin, breeding widely across the Antarctic Peninsula.
Chukotka: Russian Far East autonomous region bordering the Bering Strait visited on Arctic expedition itineraries before 2022 sanctions.
Cierva Cove: Sheltered bay on the Antarctic Peninsula popular for Zodiac cruising among brash ice and tabular bergs.
Climate Change Statement IAATO: IAATO policy document committing members to emissions reduction and operational sustainability measures.
Crabeater Seal: Most abundant Antarctic seal (Lobodon carcinophaga) named for its krill-filtering teeth.
Crystal Cruises: Luxury cruise brand, relaunched 2023 under A&K Travel Group.
Cuverville Island: Antarctic Peninsula landing site holding one of the largest Gentoo penguin rookeries on the peninsula.

D

Deception Island: Active volcanic caldera in the South Shetland Islands containing the historic Whalers Bay station.
Disko Bay: Bay on the west coast of Greenland; calving ground for icebergs from Jakobshavn Glacier.
Douglas Mawson: Aurora Expeditions expedition ship delivered in 2025, a 154 PAX X-Bow vessel named after the Australian Antarctic explorer.
Drake Passage: Strait between South America and Antarctica through which the ACC flows.
Dry Suit: Waterproof suit issued on some operators' Arctic kayak and snorkel programs to provide thermal protection.

E

EIA Antarctic: Environmental Impact Assessment required for activities in Antarctica under Annex I of the Madrid Protocol.
Elephant Seal: Largest pinniped (Mirounga leonina), a key wildlife species on South Georgia beaches such as Gold Harbour.
Emperor Penguin: Largest penguin species (Aptenodytes forsteri) found in the Weddell Sea, Ross Sea, and other true Antarctic locations.
Endurance, National Geographic: Lindblad Expeditions ice-class expedition ship delivered in 2020 with 138 PAX and Polar Code 1A capability.
Expedition Leader: Senior shoreside leader on a polar expedition ship responsible for landing planning, permits, and team direction.
Expedition Parka: Insulated outer jacket typically issued to passengers, often color-coded by operator brand.
Expedition Stamps: Souvenir passport stamps offered at Port Lockroy and select research stations and historic sites.

F

Falkland Islands: South Atlantic British Overseas Territory in the Red Ensign Group.
Faroe Islands: North Atlantic archipelago and self-governing nation within the Kingdom of Denmark.
Filchner-Ronne Ice Shelf: Major Antarctic ice shelf in the Weddell Sea, accessed only by capable icebreaker cruises.
Fin whale: *Balaenoptera physalus*, the second-largest animal on Earth.
Finnish-Swedish Ice Class: Baltic ice class system established under 1985 rules using IA Super, IA, IB, and IC notations.
Fly-Cruise Antarctica: Itinerary format pioneered by Antarctica21 using flights from Punta Arenas to King George Island in place of a Drake crossing.
Fortuna Bay: South Georgia bay with King penguin colonies and the final stretch of Shackleton's crossing route.
Franz Josef Land: Russian high-Arctic archipelago in the Barents Sea.

G

G Adventures: Canadian adventure tour operator that has chartered G Expedition for Antarctic Peninsula voyages.
G Expedition: Chartered polar expedition ship operated under the G Adventures brand for Antarctic itineraries.
Gentoo Penguin: Pygoscelid penguin (Pygoscelis papua) with an orange bill, the third species of the brushtail penguin trio.
Gold Harbour: South Georgia landing site renowned for King penguins and Southern elephant seal beaches.
Greenland East Coast: Expedition area centered on Scoresbysund, often combined with Iceland departures.
Greenland West Coast: Expedition area encompassing Disko Bay, Ilulissat, and Inuit communities along Davis Strait.
Greg Mortimer: Aurora Expeditions expedition ship delivered in 2019 with 132 PAX, the first X-Bow expedition cruise vessel built by Ulstein Verft.
Grytviken: Former whaling station on South Georgia and site of Ernest Shackleton's grave, a key heritage landing for South Atlantic voyages.
Guide-to-Passenger Ratio: IAATO standard requiring at least one staff member for every 20 passengers at Antarctic landing sites.

H

Half Moon Island: South Shetland Islands landing site with Chinstrap penguin colonies and Argentine Camara Station.
Hanseatic Inspiration: Hapag-Lloyd Cruises expedition vessel delivered in 2019.
Hanseatic Nature: Hapag-Lloyd Cruises expedition vessel delivered in 2019.
Hanseatic Spirit: Hapag-Lloyd Cruises expedition vessel delivered in 2021.
Hapag-Lloyd Cruises: German luxury and expedition cruise brand owned by TUI AG and operated under the TUI Cruises umbrella.
Helicopter Operations IMO MSC/Circ.490: IMO circular providing guidance on helicopter-assisted operations including landings on cruise vessels.
Heritage Expeditions: New Zealand expedition operator known for subantarctic and Ross Sea voyages aboard Spirit of Enderby (Professor Khromov), 50 PAX.
Historic Site or Monument: HSM, an Antarctic Treaty designation under Annex V protecting historic sites and monuments such as huts and graves.
Hondius: Oceanwide Expeditions ship delivered in 2019 with 174 PAX, marketed as the first vessel built to Polar Class 6 specifically for polar tourism.
HSM: Heerema heavy-lift vessel, occasionally calling project cargo berths.
Humpback whale: *Megaptera novaeangliae*, a cosmopolitan baleen whale known for breaching and song.
Hurtigruten Expeditions: Former brand for Hurtigruten's expedition arm, restructured in 2024 into Hurtigruten Norway and HX.
Hurtigruten Norway: Post-2024 brand for the traditional Norwegian coastal voyage operations of the historic Hurtigruten company.
HX (Hurtigruten Expeditions): Post-2024 expedition brand of the Hurtigruten group running MS Roald Amundsen, MS Fridtjof Nansen, MS Otto Sverdrup, and MS Spitsbergen.

I

IAATO: International Association of Antarctica Tour Operators, founded 1991; self-regulates Antarctic tourism.
IAATO Bylaws: Operating rules adopted by IAATO members including landing-site passenger caps and guide ratios.
IAATO Observer: Independent observer assigned to member ships to verify compliance with IAATO bylaws and procedures.
IAATO Vessel Categories: Classification of member ships into C-1, C-2, CR, YT, and Air categories based on passenger numbers and operating mode.
IACS Polar Class: International Association of Classification Societies Unified Requirements for polar class notations PC1 through PC7.
Ice class notation: Class assignment for navigation in ice, often required by flag and port authorities in polar waters.
Ilulissat Icefjord: UNESCO World Heritage site in West Greenland and a flagship destination for Disko Bay expedition cruises.
IMO Polar Code: International Code for Ships Operating in Polar Waters adopted by the IMO and effective in 2017 under SOLAS Chapter XIV and MARPOL.

J

Janssonius: Oceanwide Expeditions ship delivered in 2021 with 174 PAX, sister vessel to Hondius.

K

King George Island: Largest of the South Shetland Islands and site of the airstrip at Teniente R. Marsh used by Antarctica21 fly-cruise programs.
King Penguin: Large penguin species (Aptenodytes patagonicus) with iconic colonies on South Georgia, including Salisbury Plain and Gold Harbour.

L

L'Austral: Ponant expedition cruise ship delivered in 2011 with 264 PAX.
Le Bellot: Ponant Explorer-class ship delivered in 2020 with 184 PAX.
Le Boreal: Ponant expedition vessel delivered in 2010.
Le Bougainville: Ponant Explorer-class vessel delivered in 2019.
Le Champlain: Ponant Explorer-class vessel delivered in 2018.
Le Commandant Charcot: Ponant LNG and battery hybrid icebreaking expedition vessel delivered in 2021.
Le Dumont d'Urville: Ponant Explorer-class vessel delivered in 2019.
Le Jacques Cartier: Ponant Explorer-class vessel delivered in 2021.
Le Laperouse: Ponant Explorer-class vessel delivered in 2018.
Le Lyrial: Ponant Sisterships vessel delivered in 2015.
Le Soleal: Ponant expedition vessel delivered in 2013.
Lectern: Lecture-room podium used by naturalists for onboard talks on wildlife, geology, and history during expedition voyages.
Lemaire Channel: Narrow scenic passage on the Antarctic Peninsula between Booth Island and the mainland, nicknamed Kodak Gap.
Leopard Seal: Solitary Antarctic predator seal (Hydrurga leptonyx) often observed near penguin colonies.
Lindblad Expeditions: US expedition cruise operator allied with National Geographic.
Lindblad Explorer: Original 1969 polar expedition cruise ship pioneered under Lars-Eric Lindblad, later renamed MS Explorer.
Longyearbyen: Administrative center of Svalbard at 78 degrees 13 minutes North, the world's northernmost town with regular shipping calls.

M

Macaroni Penguin: Crested penguin (Eudyptes chrysolophus) with bright orange head plumes, breeding on South Georgia and the South Sandwich Islands.
Madrid Protocol: Protocol on Environmental Protection to the Antarctic Treaty (1991, in force 1998).
Magellan Discoverer: Antarctica21 fly-cruise expedition ship serving Drake-bypass voyages out of King George Island.
Magellan Explorer: Antarctica21 fly-cruise expedition ship delivered in 2019 with 100 PAX for Drake-bypass voyages out of King George Island.
MARPOL Polar Code: Environmental provisions of the Polar Code given mandatory effect through MARPOL amendments.
McMurdo Sound: Southern Ross Sea destination of long Ross Sea expedition itineraries and home to McMurdo Station and Scott Base.
Minke whale: Small baleen whales of the genus *Balaenoptera* (*B. acutorostrata* in N hemisphere, *B. bonaerensis* in S).
MS Bremen: Historic Hapag-Lloyd expedition ship retired from the polar fleet, an early dedicated polar tourism vessel.
MS Explorer: Polar cruise ship sunk in Antarctic waters in November 2007; catalyst for IMO polar rules.
MS Fridtjof Nansen: Hurtigruten Expeditions hybrid-powered expedition ship delivered in 2020 with 530 PAX.
MS Hanseatic: Earlier Hapag-Lloyd polar expedition ship preceding the current HANSEATIC trio.
MS Otto Sverdrup: Hurtigruten Expeditions expedition ship converted for expedition service in 2022.
MS Roald Amundsen: Hurtigruten Expeditions hybrid-powered expedition ship delivered in 2019 with 530 PAX and Polar Code 1A notation.
MS Spitsbergen: Hurtigruten Expeditions expedition ship with 220 PAX, used widely in Svalbard.
MS World Discoverer: Historic expedition cruise ship grounded in the Solomon Islands in 2000 after a long polar career.
Muck Boots: Knee-high rubber boots issued or required for wet landings on polar expedition voyages.
Mudroom: Onboard space where passengers store boots and outer gear and prepare for Zodiac landings, also called the boot room.
Muskox: Arctic ungulate (Ovibos moschatus) seen on Greenland and Canadian Arctic itineraries.
MV Ushuaia: Argentine-flagged expedition ship operated by Antarpply Expeditions with 88 PAX.

N

Narwhal: *Monodon monoceros*, Arctic odontocete with a long spiraled tusk.
National Geographic Endeavour II: Lindblad Expeditions ship with 96 PAX, primarily used in the Galapagos.
National Geographic Endurance: Lindblad Expeditions expedition ship delivered in 2020 with 138 PAX and Polar Code 1A notation.
National Geographic Explorer: Lindblad Expeditions polar expedition ship delivered in 2008 with 148 PAX.
National Geographic Orion: Lindblad Expeditions expedition ship delivered in 2003 with 102 PAX.
National Geographic Quest: US-flagged Lindblad Expeditions coastal expedition ship.
National Geographic Resolution: Lindblad Expeditions ship delivered in 2021 with 126 PAX, sister to National Geographic Endurance.
National Geographic Sea Bird: US-flagged Lindblad Expeditions coastal expedition ship used in Alaska and the Pacific Northwest.
National Geographic Sea Lion: US-flagged Lindblad Expeditions coastal expedition ship used in Alaska and the Pacific Northwest.
National Geographic Venture: US-flagged Lindblad Expeditions coastal expedition ship.
Naturalist: Subject-matter expedition staff member delivering interpretation on wildlife, ecology, and geology.
Neko Harbour: Antarctic Peninsula mainland landing site with a Gentoo penguin colony and active glacier face.
Northeast Passage: Historical name for the sea route along the Arctic coast of Eurasia, encompassing the Northern Sea Route in its Russian portion.
Northern Sea Route: Russian Arctic shipping route between the Kara Gate and the Bering Strait, regulated by Glavsevmorput.
Northwest Passage: Arctic sea route through the Canadian Archipelago, first transited 1903 to 1906 by Amundsen.
Novaya Zemlya: Russian Arctic archipelago separating the Barents and Kara Seas.

O

Ocean Adventurer: 132 PAX ice-strengthened expedition ship chartered for polar service including by Quark Expeditions.
Ocean Diamond: Ice-strengthened expedition ship chartered by Quark Expeditions for Antarctic voyages.
Ocean Endeavour: 199 PAX expedition ship operated by Sunstone and chartered for polar and Arctic voyages by operators including Adventure Canada.
Oceanwide Expeditions: Netherlands-based polar expedition operator running Plancius, Ortelius, Hondius, and Janssonius.
One Ocean Expeditions: Canadian expedition operator that ceased trading in 2019 after losing its Akademik Ioffe and Akademik Sergey Vavilov charters.
Orca: Killer whale (Orcinus orca) widely encountered in polar waters with distinct ecotypes in Antarctic and Arctic seas.
Ortelius: Oceanwide Expeditions ice-strengthened ship with 116 PAX, formerly the Russian Marina Svetaeva.

P

Paradise Bay: Antarctic Peninsula bay surrounded by ice cliffs, with the Argentine Brown Station nearby.
PC1: IACS Polar Class for year-round operation in all polar waters, including multi-year ice.
PC2: IACS Polar Class for year-round operation in moderate multi-year ice conditions.
PC3: IACS Polar Class for year-round operation in second-year ice with multi-year inclusions.
PC4: IACS Polar Class for year-round operation in thick first-year ice with old ice inclusions.
PC5: IACS Polar Class for year-round operation in medium first-year ice with old ice inclusions.
PC6: IACS Polar Class for summer and autumn operation in medium first-year ice.
PC7: IACS Polar Class for summer and autumn operation in thin first-year ice.
Permit Antarctic: Authorization issued by a competent national authority for any activity in the Antarctic Treaty area.
Petermann Island: Antarctic Peninsula island with a Gentoo penguin colony and a historic refuge hut.
Plancius: Oceanwide Expeditions ice-strengthened ship with 116 PAX, originally a Royal Netherlands Navy oceanographic vessel.
Polar Bear: Arctic apex predator (Ursus maritimus) and an emblematic species for Svalbard and east Greenland itineraries.
Polar Code Category A: Polar Code classification for ships designed for year-round operation in at least medium first-year ice including old ice inclusions.
Polar Code Category B: Polar Code classification for ships designed for year-round operation in at least thin first-year ice including old ice inclusions, not in Category A.
Polar Code Category C: Polar Code classification for ships designed to operate in open water or ice conditions less severe than Categories A and B.
Polar Cruises: US-based travel agency specializing in polar expedition bookings across multiple operators.
Polar Latitudes: US-based small-ship Antarctic operator chartering vessels including Sea Spirit and Hebridean Sky.
Polar Ship Certificate: Certificate issued under Polar Code attesting compliance and listing limitations.
Polar Water Operational Manual: PWOM, the mandatory operational manual under the Polar Code documenting procedures for polar service.
Ponant: French luxury and expedition cruise operator.
Pond Inlet: Inuit community in northern Baffin Island, Nunavut, used as a Northwest Passage entry or exit point.
Port Lockroy: Historic UK base on Goudier Island operated as a museum and post office by the UK Antarctic Heritage Trust.
Pribilof Islands: Bering Sea islands off Alaska known for fur seals and seabird colonies.
PSC, Polar: Polar Ship Certificate, distinct from Port State Control PSC.
PWOM: Polar Water Operational Manual required under Polar Code Part I-A Chapter 2 providing operators with information on ship capabilities and limitations.

Q

Quark Expeditions: Polar specialist operator founded in 1991 by Mike McDowell and Lars Wikander, part of Travelopia since 2007.

R

Reindeer: Arctic ungulate (Rangifer tarandus) including the Svalbard subspecies often seen on Spitsbergen landings.
Resolute: High Arctic Canadian community on Cornwallis Island used as a logistics hub for Northwest Passage voyages.
RIB: Rigid Inflatable Boat used as an alternative or complement to Zodiacs for tendering and shore landings.
Rockhopper Penguin: Crested penguin (Eudyptes chrysocome / E. moseleyi) found on subantarctic islands including the Falklands.
Ross Sea: Remote and expensive Antarctic destination accessed via New Zealand, encompassing McMurdo Sound and the Ross Ice Shelf.
Royal Albatross: *Diomedea epomophora* and *Diomedea sanfordi* of the Southern Ocean.
Russian Arctic: Expedition cruising area including Franz Josef Land, Novaya Zemlya, and Wrangel Island, paused commercially after 2022 sanctions.
Russian Maritime Register Ice Class: Ice class system administered by the Russian Maritime Register of Shipping using Ice1 to Ice3 and Arc1 to Arc9 notations.

S

Salisbury Plain: South Georgia coastal plain holding one of the world's largest King penguin colonies.
SCAR: Scientific Committee on Antarctic Research, the international body coordinating Antarctic science under ICSU.
Scenic Eclipse I: Scenic Group ultra-luxury expedition yacht delivered in 2019 with 228 PAX and helicopters and a submersible.
Scenic Eclipse II: Scenic Luxury Cruises discovery yacht delivered in 2023.
Scoresbysund: Large fjord system on the east coast of Greenland and a flagship expedition cruise destination.
Sea Spirit: Small ice-strengthened expedition ship chartered by Polar Latitudes and other operators.
Seabourn: Luxury brand within Carnival Corporation.
Seabourn Pursuit: Seabourn expedition vessel delivered in 2023.
Seabourn Venture: Seabourn expedition vessel delivered in 2022.
Sei whale: *Balaenoptera borealis*, a fast-swimming rorqual.
Silver Cloud Expedition: Silversea expedition ship converted in 2017 with 240 PAX in expedition configuration.
Silver Endeavour: Silversea Cruises expedition vessel acquired in 2022, formerly Crystal Endeavor.
Silver Explorer: Silversea expedition ship dating to 2008 in service for the brand with 132 PAX.
Silver Origin: Silversea Cruises Galapagos vessel delivered in 2020.
Silver Wind Expedition: Silversea ship reconfigured in 2021 for expedition service with 274 PAX.
Silversea Cruises: Luxury brand within Royal Caribbean Group.
Site-Specific Guidelines: IAATO and AECO guidelines covering individual landing sites with maps, visitor zones, and special instructions.
Snow Hill Island: Remote Weddell Sea island near an Emperor penguin colony, accessed by ice-capable cruises and helicopter operations.
Snow Petrel: Pure white Antarctic seabird (Pagodroma nivea) closely associated with sea ice.
South Georgia: Subantarctic British Overseas Territory known for King penguins, fur seals, and Shackleton heritage at Grytviken.
South Shetland Islands: Antarctic archipelago including King George Island, Half Moon Island, Deception Island, and Livingston Island.
Spirit of Enderby: Heritage Expeditions ice-class expedition ship (Professor Khromov) with 50 PAX used for subantarctic and Ross Sea voyages.
STCW Polar Training: STCW Chapter V Section A-V/4 mandatory training and qualification requirements for masters and officers on ships in polar waters.
Stromness: South Georgia former whaling station and the endpoint of Shackleton's 1916 crossing from King Haakon Bay.
Submersible Triton: Two-person tourist submersibles supplied by Triton Submarines, used by operators including Viking, Scenic, and Seabourn.
Svalbard: Norwegian Arctic archipelago centered on Spitsbergen, governed under the 1920 Svalbard Treaty.

T

Triton Submarines: US manufacturer of tourist submersibles deployed on luxury expedition ships including Viking, Scenic, and Seabourn vessels.

U

UKAHT: UK Antarctic Heritage Trust, which manages Port Lockroy and other British Antarctic heritage sites.
Ulstein Verft: Norwegian shipyard that built the first X-Bow expedition cruise ships starting with Greg Mortimer in 2019.
Ultramarine: Quark Expeditions polar expedition ship delivered in 2021 with 199 PAX, equipped with twin helicopters.

V

Vernadsky Station: Ukrainian Antarctic research station on Galindez Island near the Argentine Islands, a notable visitor stop.
Viking Expeditions: Expedition cruise division of Viking operating Viking Octantis and Viking Polaris.
Viking Octantis: Viking Expeditions vessel delivered in 2022.
Viking Polaris: Viking Expeditions vessel delivered in 2022.

W

Walrus: *Odobenus rosmarus*, large Arctic pinniped with prominent tusks.
Wandering Albatross: Large albatross (Diomedea exulans) frequently sighted on Drake Passage and South Georgia voyages.
Waste Management Plan: Shipboard plan addressing segregation, storage, and disposal of solid and liquid wastes per MARPOL and VSP.
Weddell Sea: Sea bordering Antarctica's Weddell Sector; formation region for Antarctic Bottom Water.
Weddell Seal: True Antarctic seal (Leptonychotes weddellii) found resting on fast ice in the Ross and Weddell seas.
Wilson's Storm Petrel: Small pelagic seabird (Oceanites oceanicus) commonly seen following expedition ships in Antarctic waters.
World Explorer: 172 PAX expedition ship chartered by Quark Expeditions and other operators.
World Navigator: Atlas Ocean Voyages expedition yacht delivered in 2021 with 196 PAX.
World Seeker: Atlas Ocean Voyages expedition yacht delivered in 2024 with 196 PAX.
World Traveller: Atlas Ocean Voyages expedition yacht delivered in 2022 with 196 PAX.
World Voyager: Atlas Ocean Voyages expedition yacht delivered in 2020 with 200 PAX.