Antarctic Peninsula: The 1964 US-UK Naming Bargain

Against its entry for the Antarctic Peninsula, the SCAR Composite Gazetteer of Antarctica carries a sentence that is easy to read past: agreement on this name by the American and British naming committees in 1964 resolved a long-standing difference between the American name, Palmer Peninsula, and the British name, Graham Land. The approval date is 1 January 1964. The two states whose claims cover most of the ground were not parties to it, and their names are still on the register.

Silence Index — D-210

Popular, with quiet hours

Ranks 80 of 99 scored dossiers — quieter than 19% of the others we have scored. A low score is not a warning; it describes who else will be standing next to you.

How the total is weighted. These are the fixed weights of the four inputs, the same on every dossier — not this place’s scores. We do not publish per-input bars, because the per-input values were never recorded article by article and inventing four plausible numbers that sum to the total would be a fabrication dressed as a chart.

Footfall pressure — visitors measured against the ground that absorbs them30%

Access friction — permits, caps, seasons, boats, weather windows30%

Acoustic floor — how close the nearest engine is20%

Unresolved questions — what the record still cannot settle20%

This dossier was scored before 2 September 2026, when the fourth input became night darkness. It keeps the input it was reasoned with until it is re-scored at its next source re-check; the methodology page records the change.

The index is a desk instrument scored by this publication, not a field measurement. How it is calculated, and where it fails.

What this dossier is built from

Nobody from this publication has been to Antarctica, and nothing here rests on having seen the place. It rests on registers: the SCAR Composite Gazetteer of Antarctica, read entry by entry rather than through a search box; the United States Board on Geographic Names and its Advisory Committee on Antarctic Names, including its published naming policy and its own history document; the United Kingdom Antarctic Place-names Committee, its terms of reference and its archive of published minutes; the Antarctic Treaty as printed in the United Nations Treaty Series; the Government of the British Antarctic Territory; Argentina's Instituto Geográfico Nacional; and the information papers the International Association of Antarctica Tour Operators submits each year to the Antarctic Treaty Consultative Meeting.

This is an article about a word. It is also about the difference between a name that nobody chose and a name that a small number of people chose, on a particular day, on behalf of others who were not in the room.

The bargain, as the gazetteer records it

The gazetteer's entry for the Antarctic Peninsula is a US-ACAN record. It gives the feature as extending from Prime Head in the north to a line between Cape Adams and a point on the mainland coast south of the Eklund Islands, notes that the first sighting is contested but apparently occurred in the 1820s, and then says this: "Agreement on this name by the US-ACAN and UK-APC in 1964 resolved a long-standing difference involving use of the American name, Palmer Peninsula, and the British name, Graham Land, for this feature."

The settlement was not merely lexical. It was territorial, and the other two entries show the shape of it. Graham Land, which the British had applied to the entire peninsula, was cut down to "that portion of the Antarctic Peninsula which lies north of a line joining Cape Jeremy and Cape Agassiz". Palmer Land was created for "that portion of the Antarctic Peninsula which lies south of a line joining Cape Jeremy and Cape Agassiz", and the gazetteer states plainly that this application "is consistent with the 1964 agreement between US-ACAN and UK-APC, in which the name Antarctic Peninsula was approved for the major peninsula of Antarctica, and the names Graham Land and Palmer Land for the northern and southern portions, respectively."

Both carry the approval date 1 January 1964. Both are commemorations, and the two commemorations are the two nations. Graham Land honours Sir James Robert George Graham, First Lord of the Admiralty at the time of John Biscoe's 1832 voyage. Palmer Land honours Captain Nathaniel B. Palmer, the American sealer who worked south of Deception Island in the Hero in November 1820. Each committee kept a name; neither kept the whole; and the entity itself took a third name that belonged to neither. Read as diplomacy it is elegant. Read as cartography it means that the northern third of the peninsula is British in its memory, the southern two-thirds American, and the line between them runs between two capes on a map drawn by neither of the countries that claim the ground.

Set the American record beside the British one and the agreement stops looking like a single event. The United Kingdom's own gazetteer entry for the Antarctic Peninsula carries an approval date of 20 November 1963 — six weeks before the American one. The British entry for Graham Land is older still, approved 8 September 1953, and describes the feature as the part of the peninsula north of a line from Cape Jeremy, lying between roughly 63°15' and 69°15' south.

More striking is that the two committees do not draw the same feature. The American entry ends the peninsula at a line between Cape Adams and a point south of the Eklund Islands. The British entry ends it at a line joining Rydberg Peninsula at 73°S, 80°W and the grounding line of the Evans Ice Stream at approximately 76°34'S, 75°00'W — a southern boundary the British record says was itself adjusted in 2009. Two committees agreed on what to call the thing and, sixty years on, still describe different amounts of Antarctica by it. Both entries sit side by side in the same composite register, each cross-referencing the other as an alternative name for the same feature.

What popular coverage gets wrong

The version that circulates in expedition itineraries, shipboard lecture programmes, operator briefings and general reference material runs like this. "Antarctic Peninsula" is the universal, neutral, apolitical name. "Graham Land" and "Palmer Land" are picturesque survivals: an old British usage and an old American one, quaintly preserved on charts, which faded of their own accord as international science standardised. The nationalist names are treated as historical colour, and the present name as the absence of politics.

The record does not support any part of that. The names did not fade; they were divided, on a stated date, by two named committees, and the division is written into the gazetteer entries as the reason those entries exist. Graham Land and Palmer Land are not survivals — they are products of the 1964 settlement, created in their present extents by it. Neither is the compromise name neutral in origin. It is neutral only in the narrow sense that it favoured neither of the two parties to the negotiation, which is a different thing from favouring nobody.

And the settlement bound the two parties to it. That is all it did. The gazetteer still carries, as current entries against the same ground, Chile's Península Tierra de O'Higgins and Argentina's Tierra de San Martín. A passenger who transfers from a Chilean-flagged vessel to a British-operated one has, by nomenclature, changed which piece of the earth they are standing on without moving a metre. The word "universal" is doing work in the brochures that the register will not support.

The names that were not party to it

Chile's entry describes a peninsula running from the Antarctic continent at roughly 76°S, 66°W — first north for 520 miles, then north-east for a further 330 — to about 63°S, 57°W, mountainous and snow-covered, and geologically comparable to Chilean Patagonia. It is named for Bernardo O'Higgins Riquelme. The register gives it no approval date at all: the field reads unknown. Argentina's entry is thinner still — "San Martín, tierra de", type Land, at 66°00'S 63°20'W, no approval date, and no narrative whatsoever. Two names, no dates, no reasoning published. They are simply there.

Where they are placed is itself a decision, and it is SCAR's rather than Santiago's or Buenos Aires's. Chile's O'Higgins is matched to the whole Antarctic Peninsula. Argentina's San Martín is matched to Graham Land — the northern third — so that in the composite register the Argentine name covers a smaller feature than the Chilean one, an outcome no Argentine authority we could open has stated. Palmer Land, meanwhile, carries only British and Russian alternatives. The southern two-thirds of the peninsula appear in the composite gazetteer under an American sealer's name with no Chilean or Argentine equivalent recorded against them at all, on ground both states claim.

SCAR is candid about what the register is and is not. The Composite Gazetteer is "a composite or collection of all those names of features that have been submitted by representatives of national gazetteers", covering features south of 60°S, each real feature given a unique identifier and a list of applicable names. Since 2008 Italy has edited it and Australia has run the database. And SCAR states the limit of the thing in one sentence: "The CGA is compiled purely for the convenience of the scientific community and has no legal authority or standing." It is a record of disagreement, kept tidily, by a body with no power to end it.

Why four names are allowed to stand

The legal reason is Article IV of the Antarctic Treaty, signed at Washington on 1 December 1959 and in force from 23 June 1961, with Argentina, Chile, the United Kingdom and the United States all among the twelve signatories. Article IV(1) provides that nothing in the treaty is to be construed as a renunciation of previously asserted claims, or of any basis of claim, or as prejudicing any party's position as regards its recognition or non-recognition of any other state's claim. Article IV(2) then freezes the position: "No new claim, or enlargement of an existing claim, to territorial sovereignty in Antarctica shall be asserted while the present Treaty is in force."

That is the machinery under which four names for one peninsula is not an error. Claims are neither extinguished nor honoured; they are held still. The British Antarctic Territory runs from 60°S to the South Pole between 20°W and 80°W, was constituted on 3 March 1962, and its own government states that most of its area is subject to competing claims from Argentina and Chile — while publishing, on the front of its official website, that it does so "with full recognition of Article IV of the Antarctic Treaty". Argentina's Instituto Geográfico Nacional carries its Antarctic sector inside the province of Tierra del Fuego, Antártida e Islas del Atlántico Sur, and puts that sector at 873,718 square kilometres of the province's 910,324.4. Nobody is required to accept anyone else's arithmetic, and nobody does.

The minute we could not find

Here is the gap, stated plainly, because it is the weakest joint in this article. Everything above about 1964 comes from narrative fields in a gazetteer. Those fields are US-ACAN's own summary of what happened. They are not the minute. We set out to find the actual 1964 records of the two committees and did not get them.

The United Kingdom committee publishes its minutes. The archive begins with the meeting of September 2004. There is nothing from the 1960s on it, and nothing before 2004 at all. The committee itself dates from 1945, formed when the Falkland Islands Dependencies Survey began generating names faster than anyone could regularise them, and it now sits under the Polar Regions Department of the Foreign, Commonwealth and Development Office; its terms of reference commit it to "exchange information and liaise with the Antarctic Place-Names Committees of other states" but name no other committee and record no standing agreement.

On the American side the omission is sharper. The Board on Geographic Names publishes a document called U.S. Antarctica Naming Context and History. It describes the United States' lead role in the negotiations that produced the Treaty, notes that ACAN "frequently coordinates and communicates its naming activities with naming authorities in other Antarctic Treaty nations", and says that general agreements on naming conventions are normally made through SCAR. It does not mention the Antarctic Peninsula dispute, Palmer Peninsula, the 1964 agreement or the Cape Jeremy–Cape Agassiz line anywhere. The most consequential naming decision the committee ever took is absent from its own public history of itself.

The Board's naming policy is worth setting against the outcome. Its criteria are priority of application, appropriateness and established usage; it holds that "Duplication in Antarctica of names, while common in other parts of the world, is undesirable"; and it gives as a goal, in coordination with other Treaty nations, that "only one official name is applied to a particular feature". The feature at issue has four.

The same argument, at the scale of a landing

None of this is confined to the peninsula as a whole. Work down through the register to the places people actually go and the pattern repeats, feature by feature.

Graham Passage, at 64°24'S 61°31'W, separating Murray Island from the west coast of Graham Land, named after a whale catcher by Captain Skidsmo in 1922: recorded by the United States and the United Kingdom as Graham Passage, by Argentina as "Correa, pasaje", and by Chile as "Yelcho, Paso". Three separate commemorations, one strait.
Portal Point, 64°30'S 61°46'W, named by the UK-APC in 1960 for the route to the plateau that a Falkland Islands Dependencies Survey hut opened there in 1956; carried by Argentina as "Portal, punta". In the 2025–26 season it was the third most-visited landing site on the peninsula, with 185 visits.
Aguirre Passage, 64°49'S 62°51'W, the channel between Lemaire Island and the Danco Coast that gives northern access to Paradise Harbour. Here the Chilean name won: it was named by the Chilean Antarctic Expedition of 1950–51 after Pedro Aguirre Cerda, President of Chile from 1938 to 1941, and both the American and British registers took it over in translated form while Chile carries it as "Aguirre Cerda, Canal".
Jessie Bay on Laurie Island, named in 1903 by William S. Bruce for his wife, Jessie Mackenzie Bruce, and recorded by Argentina as "Uruguay, bahía" — for the corvette, not the country.

And then there is a phrase that recurs in the American register often enough to be a habit. Jona Island, 66°55'S 67°42'W: "Shown on an Argentine government chart of 1957. Named by UK-APC for Franco P. Jona", an Italian-American physicist. Porro Bluff, on the west coast of Graham Land: "Shown on an Argentine government chart of 1950. Named by the UK-APC in 1960 for Ignazio Porro", a nineteenth-century Italian engineer. Jinks Island, in the Biscoe Islands: "Shown on an Argentine government chart of 1957. Named by the UK-APC in 1959 after a character in Charles Dickens' Pickwick Papers." The sequence is the whole argument in miniature. The survey had been done and charted; the naming was done afterwards, in London, out of Dickens.

The Antarctic Peninsula is not a remote curiosity in the tourism figures; it is very nearly the whole of Antarctic tourism. IAATO's report to the Antarctic Treaty Consultative Meeting for 2025–26 lists 112,328 vessel passengers across all categories. Of these, the Peninsula-region categories — traditional seaborne, air-cruise, yacht and cruise-only — account for 110,570 by our own addition of the paper's table. Ross Sea-only voyages carried 834 passengers; East Antarctica-only, 490. In a season that ran 164 days from 19 October 2025 to 1 April 2026, 539 voyages made 3,425 landings at 206 sites on the peninsula, putting 85,195 people ashore. The top five sites took about a quarter of all landed visits: Neko Harbour 210, Whalers Bay on Deception Island 191, Portal Point 185, Cuverville Island 169, Damoy Point and Dorian Bay 153. Port Lockroy took 102.

Every one of those people is handed a name, and hands it on.

Why the Silence Index is 53

Our four weighted inputs, at 30/30/20/20, land this well below the archive's median and the reasoning is worth showing. Physical remoteness scores high, near 78: this is still the far side of the Drake Passage. Access friction scores low, near 35, because for a paying visitor there is no permit counter and no ballot — an operator, a berth and a season. Visitor volume scores very low, near 10; more than a hundred thousand people a year go, and they concentrate on a couple of hundred sites. The fourth input we have chosen is unresolved questions, and it scores near 85, because the central document of this dossier does not appear to be public: neither committee has published its 1964 papers, and one of them has written the episode out of its own history. Weighted, that gives 53. This is one of the busiest places in Antarctica and one of the worst-documented decisions in Antarctic cartography, and the score is the average of those two facts.

What a name costs

It is easy to treat all of this as filing. It is not. A name is the smallest unit of a claim, and it is the one that travels furthest: onto a chart, into a lecture, onto a passport stamp novelty, into the sentence a returning passenger uses at home. Article IV froze the claims; it said nothing about the words, and the words have gone on working.

What the record shows is narrower and stranger than either the brochure version or its opposite. Two committees, in London and Washington, negotiated a settlement over ground neither country's courts govern, split a peninsula at a line between two capes, and gave the whole a name chosen precisely because it commemorated nobody. Then a third and a fourth name stayed on the register, belonging to the two countries nearest to the place, undated, one of them with no explanation attached at all. This is not a place where several names survive by oversight. It is the one place on earth where several official names coexist because committees deliberately produced them — and where the committee that produced the compromise cannot, or will not, show its working.

Corner Codex — D-210

Feature: Antarctic Peninsula, 69°30'S 65°00'W (SCAR Composite Gazetteer, US entry)
Names currently on the register: Four: Antarctic Peninsula (US, UK, Russia); Península Tierra de O'Higgins (Chile)
US approval date: 1 January 1964, US-ACAN
UK approval date: 20 November 1963, UK-APC
The line: Cape Jeremy to Cape Agassiz — Graham Land north of it, Palmer Land south
The name it replaced (US): Palmer Peninsula
The name it replaced (UK): Graham Land, applied to the whole peninsula by 1917
Argentina's entry: San Martín, tierra de — matched by SCAR to Graham Land, not to the whole
Overlapping claims: UK 20°W–80°W south of 60°S; Chilean and Argentine sectors overlap it
Legal position: Antarctic Treaty Article IV — claims neither renounced nor recognised
Season traffic 2025–26: 110,570 of 112,328 IAATO vessel passengers were on Peninsula itineraries
Landing sites used: 206, across 3,425 landings and 539 voyages
Silence Index: 53 / 100

The Traveler's Panel · checked 25 August 2026

Changing information. Prices, permits, seasons and road access change, sometimes at short notice. Everything here is a starting point for your own confirmation — not a quote, and not a guarantee. Verify with the operator and the relevant official body before you book.

Names on the register	Four, for one feature, all current
The 1964 agreement	US-ACAN and UK-APC only. Chile and Argentina were not parties
Where the line falls	Cape Jeremy to Cape Agassiz: Graham Land north, Palmer Land south
Approval dates	UK 20 November 1963; US 1 January 1964
Why they coexist	Antarctic Treaty Article IV — claims frozen, neither renounced nor recognised
Season length 2025–26	164 days, 19 October 2025 to 1 April 2026
Landing sites in use	206, taking 3,425 landings and 85,195 people ashore
Documentary status	The 1964 minute is not published by either committee

Getting there — By expedition vessel or air-cruise; 539 voyages made the crossing in the 2025–26 season

There is no permit counter for a visitor here, and that is the first thing to understand about the Antarctic Peninsula: it is the least administratively difficult part of Antarctica to reach and by an enormous margin the busiest. IAATO's paper to the 2026 Treaty meeting records 539 voyages in the 2025–26 season, putting 85,195 people ashore across 3,425 landings at 206 sites. The constraint on a visit is a berth and a season, not a decision by a state.
Two routes dominate the association's own categories. Traditional seaborne tourism to the Peninsula region carried 71,530 passengers on 46 vessels across 401 voyages; air-cruise itineraries, which fly one leg and sail the other, carried 11,764 on 18 vessels across 126 voyages. A further 27,217 travelled on cruise-only vessels that do not land, and 59 came by yacht.
The season is short and its edges are published. In 2025–26 the operating window ran 164 days, from 19 October 2025 to 1 April 2026. Outside it there is no tourism infrastructure of any kind, because there is no tourism infrastructure at any time — the ships are the infrastructure.
Every activity in the Treaty area, tourism included, takes place under a legal regime in which the ground beneath you is claimed by up to three states at once and recognised as nobody's. Article IV of the Antarctic Treaty holds that no acts or activities taking place while the treaty is in force constitute a basis for asserting, supporting or denying a claim. A landing is not a fact about sovereignty. Neither, legally, is a name — but names travel further than landings do.
National permitting is a matter for the operator's flag state rather than for the passenger, and it is one of the few places where the claimant question touches a traveller directly: which state authorises the voyage determines which state's paperwork, and often which state's nomenclature, the ship carries.

Indicative costs — verify before booking

Landing fee	None. There is no ticket office and no gate anywhere on the peninsula
Permit	Not the visitor's to obtain. The operator's flag state authorises the voyage
What we will not quote	Voyage prices. Every figure we found was published by an operator selling the voyage, and none by a tariff, a regulator or a state
What it costs the place	110,570 vessel passengers on Peninsula itineraries in 2025–26, concentrated on 206 sites
What it costs a name	Rather more, and the bill is not itemised anywhere

What to pack

The right name for where you are, and the knowledge that there are three others. If you are north of the Cape Jeremy–Cape Agassiz line you are in Graham Land or in Tierra de San Martín, depending on whose register you consult.
Scepticism about shipboard lecture slides. The claim that 'Antarctic Peninsula' is the neutral international name is repeated constantly and is only half true: it was neutral between two parties, in 1964, and those two parties were not the claimants.
Biosecurity discipline. Highly pathogenic avian influenza in the Peninsula region is the dominant operational concern in IAATO's own 2026 report, and it has already closed individual landing sites within recent seasons.
Patience with the register. The SCAR Composite Gazetteer is free, permanent and record-by-record; almost every feature you will be shown carries more names than the one you will be given.
No expectation of finding a document. We looked for the 1964 minute and did not find it, and neither committee appears to publish anything from that decade.

Where to stay

Nobody stays on the Antarctic Peninsula who is not working there. There is no hotel, no hostel, no campsite with a tariff and no settlement that will take a booking; the accommodation is the vessel that brought you and it leaves when it leaves. The permanent human presence is scientific and national, and it is worth noticing that the stations themselves are part of the naming story rather than separate from it: the American station on Anvers Island near Bonaparte Point is Palmer Station on the United States register and appears on the Russian one in the form Palmer /USA/, and the Chilean stations that operated at Waterboat Point on Aguirre Passage from 1951 to 1973 are the reason that channel bears a Chilean president's name in three countries' gazetteers. For a visitor the practical answer is that the berth is the bed, that the 2025–26 season ran 164 days and no longer, and that the 27,217 people who came on cruise-only vessels did not set foot on the peninsula at all.

Safety & responsible travel

Do not repeat the claim that Graham Land and Palmer Land are faded old usages. Both were created in their present extents by an agreement dated 1 January 1964, and the gazetteer entries say so in terms.
If you use 'Antarctic Peninsula' — and you probably should, because it is the working scientific usage — do not describe it as the name nobody chose. Two committees chose it, and two other countries with standing claims did not.
Be careful with the composite gazetteer's authority. SCAR states in its own words that the register is compiled purely for the convenience of the scientific community and has no legal authority or standing. It is not an adjudication and does not present itself as one.
Treat the Chilean and Argentine names as current rather than historical, because that is what the register does, and note that neither carries an approval date on it.
Follow the visitor site guidelines rather than a guide's summary of them. Eight were newly adopted or updated for the 2026 meeting, and the sites this season concentrated a quarter of all landings into five places.
Leave the argument where you found it. Nothing a visitor does south of 60°S can support or deny anybody's claim, by the express words of Article IV, and behaving as though it can is the one genuinely political act available here.

Nearby, and quieter

Everything a Peninsula itinerary shows you is inside the same argument. Deception Island, whose Whalers Bay took 191 landing visits in 2025–26, sits in the South Shetlands within all three overlapping claims. Neko Harbour, the season's most-visited site at 210 visits, and Cuverville Island at 169 lie on the Danco Coast within a few hours' sailing of Aguirre Passage, which the Chileans named and the Americans and British adopted in translation. Portal Point, third at 185 visits, is a UK-APC name of 1960 that Argentina carries as Portal, punta. North-east across the Antarctic Sound the register keeps going: Jessie Bay on Laurie Island in the South Orkneys, named by a Scotsman for his wife in 1903, is Bahía Uruguay to Argentina, for the corvette that took Nordenskjöld's men off the ice. There is no part of this coast where you are looking at a feature with one name.

Getting there, in order

1Portal Point
↓
2Aguirre Passage
↓
3Antarctic Peninsula
↓
4Graham Land

Each leg is a separate booking and a separate chance to be weathered out. Build spare days into the chain, not onto the end of it.

Where it is

Antarctic Peninsula — Graham Land, Palmer Land, Tierra de O'Higgins, Tierra de San Martín · 69.5000°S 65.0000°W · Open in Google Maps · OpenStreetMap

Key locations

Antarctic Peninsula — the SCAR entry carrying the 1964 US-ACAN/UK-APC agreement, approved 1 January 1964
69.5000°S 65.0000°W
Graham Land — north of the Cape Jeremy–Cape Agassiz line; the British name, cut down by the bargain
66.0000°S 63.5000°W
Palmer Land — south of the same line; the American name, and no Chilean or Argentine entry against it
71.5000°S 65.0000°W
Península Tierra de O'Higgins — Chile's entry for the whole peninsula, approval date recorded as unknown
70.0000°S 65.0000°W
San Martín, tierra de — Argentina's entry, matched by SCAR to Graham Land rather than to the whole
66.0000°S 63.3333°W
Portal Point — UK-APC 1960; Argentina's Portal, punta; third most-visited landing site in 2025–26
64.5000°S 61.7667°W
Aguirre Passage — northern access to Paradise Harbour; the Chilean name the US and UK adopted
64.8167°S 62.8500°W
Graham Passage — Graham Passage to the US and UK, Correa to Argentina, Yelcho to Chile
64.4000°S 61.5167°W

Coordinates are for orientation and are accurate to roughly the width of the feature named, not to a doorway. Several of these points are inside protected areas or need a permit, a guide or a boat — read the access notes above before you plan a route to any of them.

Sources & further reading — checked 25 August 2026

SCAR Composite Gazetteer of Antarctica — Antarctic Peninsula (US-ACAN entry, gaz_id 121848). The narrative recording that agreement on this name by the US-ACAN and UK-APC in 1964 resolved a long-standing difference between the American name Palmer Peninsula and the British name Graham Land; extent from Prime Head to a line between Cape Adams and a point south of the Eklund Islands; 69°30'S 65°00'W; approval date 1 January 1964; and three alternative names including Chile's Tierra de O'Higgins, Península
SCAR Composite Gazetteer of Antarctica — Graham Land (US-ACAN entry, gaz_id 125861). Graham Land defined as that portion of the Antarctic Peninsula lying north of a line joining Cape Jeremy and Cape Agassiz, consistent with the 1964 US-UK agreement; derivation from Sir James R. G. Graham, First Lord of the Admiralty at the time of Biscoe's 1832 voyage; 66°00'S 63°30'W; approval 1 January 1964; and Argentina's San Martín, tierra de as an alternative name
SCAR Composite Gazetteer of Antarctica — Palmer Land (US-ACAN entry, gaz_id 129812). Palmer Land defined as the portion south of the Cape Jeremy–Cape Agassiz line, with the explicit statement that this application is consistent with the 1964 agreement between US-ACAN and UK-APC; derivation from Capt. Nathaniel B. Palmer, who explored south of Deception Island in the Hero in November 1820; 71°30'S 65°00'W; approval 1 January 1964; and alternative names only from the United Kingdom and Russia
SCAR Composite Gazetteer of Antarctica — Antarctic Peninsula (UK-APC entry, gaz_id 107532). The British approval date of 20 November 1963, six weeks before the American one; the British southern limit given as a line joining Rydberg Peninsula at 73°S 80°W and the grounding line of the Evans Ice Stream at about 76°34'S 75°00'W, adjusted in 2009; and the note that the United Kingdom used Graham Land for the whole peninsula until 1964
SCAR Composite Gazetteer of Antarctica — Graham Land (UK-APC entry, gaz_id 109087). The British entry approved 8 September 1953, defining Graham Land as the part of the Antarctic Peninsula north of a line from Cape Jeremy, between about 63°15' and 69°15' south; first sighted by Bransfield in January 1820; and the note that the name had been applied to the whole peninsula by 1917
SCAR Composite Gazetteer of Antarctica — Tierra de O'Higgins, Península (Chile, gaz_id 105420). Chile's entry for the same feature, at 70°00'S 65°00'W with approval date recorded as unknown; the Spanish narrative describing a peninsula running from about 76°S 66°W north for 520 miles then north-east for 330 to about 63°S 57°W, geologically comparable to Chilean Patagonia; and the derivation from Bernardo O'Higgins Riquelme
SCAR Composite Gazetteer of Antarctica — San Martín, tierra de (Argentina, gaz_id 102111). Argentina's entry, feature type Land, at 66°00'S 63°20'W, with no narrative and no approval date recorded; and its cross-matching in the composite register to Graham Land rather than to the whole Antarctic Peninsula — the basis for this dossier's point that SCAR's matching is itself a decision
SCAR Composite Gazetteer of Antarctica — Graham Passage (gaz_id 125862). A passage at 64°24'S 61°31'W separating Murray Island from the west coast of Graham Land, named by Captain Skidsmo after his whale catcher in 1922, carried simultaneously as Graham Passage by the US and UK, as Correa, pasaje by Argentina and as Yelcho, Paso by Chile
SCAR Composite Gazetteer of Antarctica — Portal Point (gaz_id 130269). Portal Point at 64°30'S 61°46'W on the Reclus Peninsula, where a FIDS hut was established in 1956, named by the UK-APC in 1960 because the point was the gateway to the plateau route, and carried by Argentina as Portal, punta
SCAR Composite Gazetteer of Antarctica — Aguirre Passage (gaz_id 121618). The channel at 64°49'S 62°51'W between Lemaire Island and the Danco Coast permitting northern access to Paradise Harbour, named by the Chilean Antarctic Expedition of 1950–51 after Pedro Aguirre Cerda, President of Chile 1938–41; Chilean stations at Waterboat Point 1951–73; and Chile's own form, Aguirre Cerda, Canal
SCAR Composite Gazetteer of Antarctica — Jessie Bay (gaz_id 127095). A bay on the north side of Laurie Island in the South Orkneys at 60°44'S 44°44'W, surveyed in 1903 by the Scottish National Antarctic Expedition and named by William S. Bruce for his wife Jessie Mackenzie Bruce, and recorded by Argentina as Uruguay, bahía
SCAR Composite Gazetteer of Antarctica — Jona Island (gaz_id 127152). An island at 66°55'S 67°42'W in Hanusse Bay described as shown on an Argentine government chart of 1957 and then named by the UK-APC for Franco P. Jona, a physicist — one of the recurring 'shown on an Argentine chart, named by the UK-APC' formulations quoted here
SCAR Composite Gazetteer of Antarctica — Porro Bluff (gaz_id 130267). A bluff at 64°45'S 62°33'W overlooking the Errera Channel on the west coast of Graham Land, shown on an Argentine government chart of 1950 and named by the UK-APC in 1960 for Ignazio Porro, the Italian engineer who devised the Porro prism combination
SCAR Composite Gazetteer of Antarctica — Jinks Island (gaz_id 127104). An island at 65°22'S 65°38'W in the Pitt Islands, shown on an Argentine government chart of 1957 and named by the UK-APC in 1959 after a character in Charles Dickens's Pickwick Papers
SCAR Composite Gazetteer of Antarctica — Ahlmann Glacier (gaz_id 121622). A glacier flowing into Seligman Inlet on the east coast of Graham Land at 67°52'S 65°45'W, charted by FIDS in 1947, and carried in four national forms: Ahlmann Glacier by the US and UK, Ahlmann, glaciar by Argentina and Ahlmann, Glaciar by Chile
SCAR Composite Gazetteer of Antarctica — Palmer Inlet (gaz_id 129811). An inlet on the east coast of Palmer Land at 71°15'S 61°10'W, discovered by the United States Antarctic Service East Base in 1940 and approved 1 January 1952, carried also as Palmer, ensenada by Argentina and Palmer, Ensenada by Chile — showing that Chilean and Argentine names do exist for features inside Palmer Land even though none is recorded against Palmer Land itself
SCAR Composite Gazetteer of Antarctica — Palmer Station (gaz_id 129814). The United States station on Anvers Island near Bonaparte Point at 64°46'S 64°05'W, listed with no approval date and recorded by Russia in the form Palmer /USA/
SCAR Composite Gazetteer of Antarctica — Ameghino Gully (gaz_id 121750). A gully on the Nordenskjold Coast whose name derives from the Argentine Refugio Ameghino, itself named for the palaeontologist Florentino Ameghino — an instance of an Argentine refuge name being carried into the American register
SCAR — Composite Gazetteer of Antarctica (SCAGI product page). SCAR's description of the CGA as a composite of names submitted by representatives of national gazetteers, covering features south of 60°S including undersea and under-ice, each with a unique identifier; joint Italian and Australian management since 2008; and the statement that the CGA is compiled purely for the convenience of the scientific community and has no legal authority or standing
United Nations Treaty Series — The Antarctic Treaty, vol. 402, I-5778. The treaty as signed at Washington on 1 December 1959 and in force from 23 June 1961, with Argentina, Chile, the United Kingdom and the United States among the twelve signatories; Article IV(1)(a)–(c) on non-renunciation and non-recognition; Article IV(2) freezing new or enlarged claims; and Article VI applying the treaty south of 60° South Latitude
United States Geological Survey — U.S. Board on Geographic Names, Antarctic Names. ACAN's remit to select commemorative names for recommendation to the BGN; the observation that Antarctica has no indigenous population and no sovereign territory and is managed under the Antarctic Treaty; and links to the naming policy, the naming history document and the Antarctic gazetteer downloads
U.S. Board on Geographic Names — Policy for naming geographic features in Antarctica (PDF). The three criteria of priority of application, appropriateness and established usage; the scope of all land south of 60°S; coordination with naming authorities in the United Kingdom, Australia, New Zealand and Argentina; the statement that duplication of names in Antarctica is undesirable; and the goal that only one official name is applied to a particular feature
U.S. Board on Geographic Names — U.S. Antarctica Naming Context and History (PDF). That since 1995 the USGS through ACAN has been the lead agency for US Antarctic naming; that ACAN frequently coordinates with naming authorities in other Treaty nations and that general naming conventions are agreed through SCAR; the US role in the 1959 Treaty; and the complete absence of any account of the Antarctic Peninsula dispute, Palmer Peninsula, the 1964 agreement or the Cape Jeremy–Cape Agassiz line
United States Geological Survey — U.S. Board on Geographic Names. The Board's creation in 1890 and re-establishment by Public Law 80-242, codified at 43 U.S.C. §364, with Antarctic names as one of its four standing responsibilities alongside domestic, foreign and undersea names
UK Antarctic Place-names Committee — gazetteer and committee site. The APC's remit to consider proposals for the British Antarctic Territory and South Georgia and the South Sandwich Islands; its operation under the Foreign and Commonwealth Office and the British Antarctic Survey; and its published sections for naming guidelines, gazetteers and meeting minutes
UK Antarctic Place-names Committee — History of the Committee. The committee's establishment in 1945 in response to the volume of names generated by the Falkland Islands Dependencies Survey, and its present position under the Polar Regions Department of the Overseas Territories Directorate — with no mention anywhere of the 1964 agreement with the United States
UK Antarctic Place-names Committee — Terms of Reference. The committee's function of advising the Commissioners of the British Antarctic Territory and of South Georgia and the South Sandwich Islands; meetings at least twice yearly; endorsement by the Commissioners before names appear on official maps and charts; and the undertaking to exchange information and liaise with the place-names committees of other states, none of which is named
UK Antarctic Place-names Committee — Meeting minutes archive. The complete published run of APC minutes, beginning with the meeting of September 2004 and running to October 2025 — establishing that no minutes from 1964, or from any year before 2004, are published, which is the documentary gap this dossier declares
UK Antarctic Place-names Committee — Gazetteers. The two gazetteers the APC maintains, for the British Antarctic Territory and for South Georgia and the South Sandwich Islands, published as bulk data endpoints rather than as a searchable interface, and its pointer to the SCAR Composite Gazetteer for all other national names
Government of the British Antarctic Territory — About the Territory. The Territory's extent from 60°S to the South Pole between 20°W and 80°W; its formation on 3 March 1962, having previously been a Dependency of the Falkland Islands; the statement that most of its area is subject to competing claims from Argentina and Chile; and that all claims are held in abeyance under Article IV
Government of the British Antarctic Territory — official site. The Territory described as the United Kingdom's largest Overseas Territory, and the statement carried on the site itself that it is published with full recognition of Article IV of the Antarctic Treaty
British Antarctic Survey — The Antarctic Treaty. The Treaty's entry into force on 23 June 1961 following ratification by the twelve countries then active in Antarctic science, and the setting aside of disputes over territorial sovereignty as one of its stated objectives
IAATO — Data and Statistics, 2025–26 season at a glance. The headline season figures published by the association: 85,195 landed visitors, 27,217 cruise-only visitors and 1,106 deep field visitors, with monitoring and reporting of Antarctic tourism trends since 1991
IAATO — Operator Use of Antarctic Peninsula Landing Sites (ATCM 48, IP199, 2026). The 2025–26 Peninsula season measured to 10 April 2026: 206 sites used, 85,195 landed passengers, 539 voyages and 3,425 landings across 164 days from 19 October 2025 to 1 April 2026; and the five most-visited sites at about 26.5% of landed visits — Neko Harbour 210, Whalers Bay 191, Portal Point 185, Cuverville Island 169, Damoy Point/Dorian Bay 153, with Port Lockroy at 102
IAATO — Overview of Antarctic Vessel Tourism: the 2025–26 Season (ATCM 48, IP200 rev.1, 2026). The category table used for this dossier's arithmetic: Peninsula traditional seaborne 71,530, air-cruise 11,764, yacht 59 and cruise-only 27,217; Ross Sea only 834; East Antarctica only 490; East Antarctica and Ross Sea 123; Ross Sea and Peninsula 311; a stated total of 112,328 for 2025–26 against 117,224 for 2024–25
IAATO — Report of the International Association of Antarctica Tour Operators (ATCM 48, IP194 rev.1, 2026). IAATO's membership of 140, comprising 54 operators and provisional operators and 86 associates; the adoption of eight new and updated visitor site guidelines; and continuing concern over highly pathogenic avian influenza in the Antarctic Peninsula region
Instituto Geográfico Nacional (Argentina) — División Política, Tierra del Fuego, Antártida e Islas del Atlántico Sur. The province's surface given as 910,324.4 km², of which 873,718 km² is the Argentine Antarctic Sector including the South Orkney Islands and 15,908 km² the South Atlantic islands; capital Ushuaia; population 173,715 in 2020
Instituto Geográfico Nacional (Argentina) — Nomenclador Geográfico, introduction. The Nomenclador described as a dynamic register of geographic names bringing together denominations approved for official use in the Argentine Republic, with provincial offices including Tierra del Fuego, Antártida e Islas del Atlántico Sur, and a separate section on the toponymy of the Malvinas
United States Geological Survey — Antarctic gazetteer staged products listing. The current US Antarctic gazetteer downloads in geodatabase, GeoPackage and text formats, all dated 2 July 2026 — establishing that the American register is actively republished, which is why its silence on 1964 is a present-tense omission rather than a historical one
Instituto Antártico Chileno — Sobre INACH. INACH's constitution under the Estatuto Orgánico approved by DFL 82 and its statement that Chile is an Antarctic country with sovereign rights over a sector of the continent — the only Chilean official statement of position we were able to open

Official and scientific bodies are the authority for safety, regulatory and scientific claims. Commercial operators are used only for practical detail such as tour length, meeting points and indicative pricing — never for a safety or scientific statement.

How this was made

Desk research. Compiled from official bodies, scientific and conservation sources, established journalism and licensed operators. Not based on a personal visit.

Editor’s method note — what we checked, corrected and could not verify

Desk research only. Nobody from this publication has been to Antarctica or to any part of the Antarctic Peninsula, and nothing in this dossier depends on having been there.
Every URL cited was opened and read before citation. Sources that could not be opened are listed near the end of this note and are cited nowhere in the piece.
The SCAR Composite Gazetteer entries were reached individually by their permanent gaz_id record URLs. The gazetteer's own front end at placenames.aq requires JavaScript and returned nothing readable to us, so the record URLs are what we cite. Each gaz_id given in the sources was opened and its narrative, coordinates, approval date and alternative names transcribed.
The central weakness of this dossier is stated in the body and repeated here. The account of the 1964 agreement comes from narrative fields written by US-ACAN inside a gazetteer. It is the American committee's own summary of a negotiation, not a minute, not a memorandum of understanding and not a published text of the agreement. We tried and failed to get closer.
Specifically: the UK Antarctic Place-names Committee publishes its minutes, and the archive we opened begins in September 2004 with nothing earlier. The committee's own history page and terms of reference do not mention the 1964 agreement or the United States committee by name. The US Board on Geographic Names' published Antarctic naming history does not mention the Antarctic Peninsula dispute, Palmer Peninsula, the 1964 agreement or the Cape Jeremy–Cape Agassiz line at all. We did not locate a BAS Archives online catalogue; the archives pages we tried returned 404.
We do not print coordinates for Cape Jeremy or Cape Agassiz. The line between them is quoted verbatim from the Graham Land and Palmer Land gazetteer narratives, but we did not succeed in opening the gazetteer records for the two capes themselves before our access was rate-limited, and we will not reproduce coordinates we have not read on the record page.
We could not verify from Chilean or Argentine national sources that their own gazetteers carry these names as current. Argentina's IGN Nomenclador is a JavaScript search application that returned nothing to us; Chile's INACH publishes no toponymic register we could find, and the Chilean and Argentine legal instruments defining the two Antarctic sectors were unreachable. What we can say, and all we say, is that the SCAR composite register carries both names as current entries submitted by those countries' gazetteer representatives.
The claim degrees we print — 20°W to 80°W, south of 60°S — are the British Antarctic Territory's own, from the Territory's government website. We do not print degrees for the Chilean or Argentine sectors, because we could not open the founding instruments. We give Argentina's Antarctic sector area only as its own Instituto Geográfico Nacional states it.
The figure of 110,570 Peninsula-region vessel passengers is our own addition of four rows of IAATO's published category table, and is labelled as such in the body. The paper's own stated total is 112,328. IAATO's separate season-at-a-glance page gives 85,195 landed, 27,217 cruise-only and 1,106 deep field, which do not reconcile to the same total; we print both sets and name both rather than choosing one.
Sources we could not read, and therefore did not cite: the Antarctic Treaty Secretariat at ats.aq, robots-blocked in full, which is why the treaty text is cited from the United Nations Treaty Series instead; legislation.gov.uk, robots-blocked, so the British Antarctic Territory Order is not quoted; the New Zealand Antarctica Act 1960, 403; AustLII's Australian Treaty Series copy, 403; the NSF Antarctic Treaty page, robots-blocked; the CIA World Factbook Antarctica entry, which has been sunset; the Australian Antarctic Division, blocked at the network layer; the UK Antarctic Heritage Trust's Port Lockroy pages, 403; the APC's British Antarctic Territory gazetteer bulk endpoint, which returned 400 to every query we framed; the SCAR CGA front end and metadata record, both JavaScript-only; the USGS Antarctic names search application, JavaScript-only; Argentina's InfoLeg and argentina.gob.ar copies of Ley 26.552, 403 and error pages; Chile's Biblioteca del Congreso Nacional LeyChile interface, JavaScript-only; Chile's SHOA, 405; DIFROL, 404; the Argentine foreign ministry's Antarctic pages, which timed out; and BAS's own territorial-claims and archives pages, 404.
Things we could not verify: the text of the 1964 agreement itself, in any form, from either committee; which body actually initiated it and on what date it was concluded, the two committees' approval dates being 20 November 1963 and 1 January 1964; whether Chile or Argentina were informed of it, consulted about it or objected to it at the time; the approval dates for Chile's Península Tierra de O'Higgins and Argentina's Tierra de San Martín, both of which the composite gazetteer records as unknown; why the composite gazetteer matches Argentina's name to Graham Land while matching Chile's to the whole peninsula, and whether either country agrees with that matching; whether any Chilean or Argentine name is recorded against Palmer Land in those countries' own registers, none being recorded in the composite one; the exact meridians of the Chilean and Argentine Antarctic claims from their founding instruments; the coordinates of Cape Jeremy and Cape Agassiz on their own gazetteer records; and what any operator charges to reach any of this, which we decline to estimate.

AI is used to draft this text, and a human checks it. Every figure, date and quotation above was verified by Tony Hall against the source cited for it in the reference list; where sources disagree, the disagreement is shown rather than resolved, and where a claim could not be confirmed it is either marked unverified or left out. The illustrations are AI-created and labelled as such — no photograph on this site is presented as a record of a real place. Full disclosure · Editorial policy.

Access details change — recheck before you travel. Found an error? Tell us — corrections are dated and shown in place.

The 1964 Naming Bargain: Two Committees Settled the Antarctic Peninsula, and Two Claimants Were Never Asked