Question:  Admiral Colpoys was a vessel that made four complete voyages to a remote and inhospitable collection of islands with a total land aera of what?

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Kitty's Amelia (1803 ship): Kitty's Amelia was "Jeune Amélie" launched in France in 1802.  A British letter of marque captured her in 1803 and she became a Liverpool-based slave trader.  Between 1804 and 1807 she made four slave-trading voyages but her chief claim to fame is that she performed the last legal slaving voyage for a British vessel.  She was reported wrecked in 1809.

William Pitt (1803 ship): William Pitt was a three-decker sailing ship, built in Liverpool in 1803.  She made three complete voyages for the British East India Company, and on the first of these she transported convicts to New South Wales.  In December 1814 she was lost in a gale to the east of Algoa Bay while homeward bound from her fourth voyage.

Lady Nugent (1814 ship): Lady Nugent was built at Bombay in 1813.  She made four voyages under contract to the British East India Company (EIC).  She then made two voyages transporting convicts to Australia, one to New South Wales and one to Van Diemen's Land (Tasmania).  She also made several voyages with emigrants to New Zealand under charter to the New Zealand Company.  She foundered in May 1854 with the loss of some 400 persons, most of them soldiers that she was carrying from Madras to Rangoon.

Malabar (1795 ship): Malabar was the Nieuwland, launched in 1794 for the Dutch East India Company.  The British seized her in 1795 and new owners renamed her "Malabar".  She made two complete voyages under charter to the British East India Company before she burnt at Madras in 1801 in an accident.

South Georgia and the South Sandwich Islands: South Georgia and the South Sandwich Islands (SGSSI) is a British overseas territory in the southern Atlantic Ocean.  It is a remote and inhospitable collection of islands, consisting of South Georgia and a chain of smaller islands known as the South Sandwich Islands.  South Georgia is 165 km long and 1 to wide and is by far the largest island in the territory.  The South Sandwich Islands lie about 700 km southeast of South Georgia.  The territory's total land area is 3903 km2 .  The Falkland Islands are about 1300 km north-west from its nearest point.

Admiral Colpoys (1792 ship): Admiral Colpoys was a vessel built in South America in 1792 that the British captured circa 1800.  Her new name refers to Admiral John Colpoys.  She first traded between London and the Caribbean.  Between 1802 and 1807 she made three voyages transporting slaves from the Gold Coast to the Americas.  After the abolition of the British slave trade in 1807 she became a merchant vessel.  Then in 1813 new owners turned her towards seal hunting.  She made four complete voyages to South Georgia before she was wrecked in 1817 during her fifth seal hunting voyage.

DuBuc (1797 ship): DuBuc was a vessel captured in 1797 and sold that year for mercantile use.  She initially became a West Indiaman, but then the whaling company Mather & Co. purchased her.  She made four voyages for them, being condemned at Hobart in October 1808.

HMS Echo (1797): HMS "Echo" was launched in 1797 at Dover.  She served on the Jamaica station between 1799 and 1806, and there captured a small number of privateers.  The Navy sold her in 1809 and she became a whaler.  She made four complete whale-hunting voyages and was wrecked in the Coral Sea in April 1820 during her fifth whaling voyage.

Treasure voyages: In Chinese history, the treasure voyages were the seven Ming-era maritime voyages of the treasure fleet between 1405 and 1433.  The Yongle Emperor initiated the construction of the treasure fleet in 1403.  The grand project resulted in seven far-reaching ocean voyages to the coastal territories and islands in and around the South China Sea, the Indian Ocean, and beyond.  Admiral Zheng He was commissioned to command the treasure fleet for the expeditions.  Six of the voyages occurred during the Yongle reign (r. 1402–24), while the seventh voyage occurred under the Xuande reign (r. 1425–1435).  The first three voyages reached up to Calicut on India's southwestern coast, while the fourth voyage went as far as Hormuz in the Persian Gulf.  Afterwards, the fleet made voyages farther away to the Arabian Peninsula and East Africa.

Phoenix (1821 whaler): Phoenix, or Phenix, was an American wooden whaler, launched in 1821.  She plied the Pacific Ocean from her homeport of Nantucket, Massachusetts.  She made ten complete voyages between 1821 and her loss, on her 11th voyage, in 1858.

Supporting paragraphs: Admiral Colpoys (1792 ship) South Georgia and the South Sandwich Islands
Answer: 3903 km2