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Dutch sailors believed tiny protective spirits lived in the carved figure at the bow, and that a ship lost without one doomed its crew's souls to haunt the sea. The urge to give a ship a face runs back millennia: Greek galleys painted eyes on their bows, Phoenicians carved horse heads for speed, the lionesses on Ramses III's ships in the Medinet Habu relief likely represent the war goddess Sekhmet, and Viking longships bore toothy monsters as apotropaic magic. In Burma, royal barges of the Konbaung dynasty carried different mythical figureheads by rank. With skeleton built hulls and a strong stem head, 16th century galleons gained a mount for large carvings, which served as name tags for dock workers who could not read.

Baroque figureheads grew to several tons and dragged bows into the waves. In 1796 the Admiralty tried to ban them on new ships to save money, but crews saw a faceless ship as cursed, so surveyors instead cut arms and color from designs, and carvers moved details onto trail boards. Carving families such as the Dickersons and the Hellyers competed for contracts, while Parsi carvers at Bombay Dockyard worked in Malabar teak. The ram bows of ironclads finally left no place for them.

• Records show Elizabeth Chichley carving the figurehead for HMS Royal Sovereign in 1786.
• Teak built ships from Bombay, including HMS Seringapatam of 1819 and HMS Asia of 1824, lasted more than 50 years.
• HMS Rodney, launched in 1884, was the last British battleship to carry a figurehead.
• The sloop HMS Espiegle kept hers until she was scrapped in 1923.
• The SS Imperator of 1910 bolted a bronze eagle on a globe to her bow to claim the title of longest ship in the world.

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The worst maritime disaster in US history was not the Titanic but the Sultana, a wooden steamboat whose boilers exploded on the Mississippi at two in the morning in April 1865, killing up to 1,700 people. Most were Union soldiers freed from prison camps such as Andersonville, packed aboard far past legal capacity, and the news was buried beneath the hunt for John Wilkes Booth. The episode traces how steam reached the water: Newcomen's atmospheric engine, James Watt's double acting cylinder, and the high pressure engines of Oliver Evans and Richard Trevithick that were light enough for a boat and prone to burst, since crews had no reliable pressure gauges.

John Fitch ran a commercial steamboat on the Delaware in 1788 but lost out to good wagon roads, and William Symington's Charlotte Dundas towed two 70 ton barges into a headwind in 1803. Robert Fulton won the credit in 1807 with a Boulton and Watt engine and a Hudson River monopoly secured with Robert Livingston. Ocean crossings waited for fuel efficient compound engines, while on western rivers flat bottomed boats cleared the forests for fuel, silting the Mississippi and worsening its floods.

• The SS Savannah crossed the Atlantic in 1819 with 75 tons of coal and 25 cords of wood but mostly used its sails.
• Early ocean steamers gave up to 40 percent of their cargo space to fuel.
• The Panama steamer route cut the gold rush trip to San Francisco from 160 days to about 40, and the SS California arrived with around 400 aboard a ship built for 200.
• Stranded riverboats were walked over sandbars by grasshoppering, levering the bow up on spars with a steam winch.
• Mary Millicent Miller became the first woman to earn a steamboat master's license in 1884, and Callie Leach French held both pilot and master licenses.

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From its royal monopoly in 1600 until 1834, the British East India Company controlled trade between England, the Cape of Good Hope, India, and China, and its East Indiamen were the largest merchant ships regularly built anywhere. At 1,100 to 1,400 tons, with two accommodation decks and a tumblehome hull that kept the weight of upper deck cannons near the centerline, they were built like warships. During the French Revolutionary and Napoleonic Wars they were painted in Royal Navy colors with fake gun ports, and in 1795 the Navy bought two still on the stocks at Deptford, renamed them HMS Weymouth and HMS Madras, and rated them 56 gun fourth rates.

Captains bought their commands for 8,000 to 10,000 pounds, a post they could resell or will to heirs, and earned it back through 50 tons of free outbound freight and 20 tons inbound, clearing 4,000 to 12,000 pounds a voyage on a ship chartered for only four round trips. Some of the finest ships were built of teak in India. Without chronometers, the Arniston wrecked near Cape Agulhas in 1815 with 372 lost, and the 1755 wreck of the Doddington, later looted with explosives, helped drive the 2001 UNESCO convention on underwater heritage.

• The Exeter captured the French frigate Médée in 1800.
• At Pulo Aura in 1804, Commodore Nathaniel Dance formed his merchant ships into a battle line and Admiral Linois's French squadron retreated.
• In 1795 the General Goddard captured seven Dutch East Indiamen off St. Helena.
• Doddington survivors spent seven months on Bird Island in Algoa Bay before building a boat from the wreckage.
• The last reputed East Indiaman, the teak built Java of 1813, ended as a coal hulk in Gibraltar and was broken up in 1939.

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Nantucket began as geological debris: a pile of sand and gravel bulldozed south by the Laurentide Ice Sheet, left as a moraine and outwash plain, and cut off from the mainland by rising seas 5,000 to 6,000 years ago. Its name likely comes from an Algonquian word some translate as sandy, sterile soil tempting no one. In 1659 Thomas Mayhew sold 90 percent of his interest to Tristram Coffin and his investors for 30 pounds and two beaver hats. The settlers ran sheep, whose hooves and grazing stripped the thin vegetation and let the sand blow away, so the island turned to whaling, first rowing out from the beaches with Wampanoag men held in debt bondage at the oars.

Whaling voyages ran like venture capital, with crews paid a lay, a share of the oil profits, and Quaker owners who backed abolition and the Underground Railroad grew rich on it. Then came collapse: the Great Fire of July 1846 burned 40 acres of the oil soaked town, a sandbar locked the larger whale ships out of the harbor while New Bedford had a railroad, the 1849 Gold Rush drained the crews, and Confederate raiders sank what was left. Poverty froze the town in place for nearly a century, and that preserved architecture became the draw for 1950s developers selling an exclusive summer escape.

• The whaling business allegedly began when a scrag whale, likely a gray whale, wandered into the harbor.
• A typical early whaleboat carried one white colonist at the steering oar and five indebted Wampanoag rowers.
• An epidemic in 1763 killed 222 Wampanoag while leaving the white colonists untouched.
• In 1977 the town considered seceding from Massachusetts over political representation.
• A 2021 coastal resilience plan lists 40 projects costing an estimated $930 million, against $3.4 billion in damages by 2070 if nothing is done.

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In May 1498 an exhausted Vasco da Gama knelt in a temple in Calicut, modern Kozhikode, and prayed before a statue he took for the Virgin Mary. It was the Hindu goddess Parvati. Born in Sines in the 1460s to a minor noble family tied to the Order of Santiago, da Gama was a naval enforcer, not a scholar, when Portugal chose him to break the Venetian and Mamluk grip on the spice trade. In July 1497 he left Lisbon with four ships and about 170 men, swung hundreds of miles west into the South Atlantic on the volta do mar, and spent over three months out of sight of land. At Malindi he gained a Gujarati pilot who rode the monsoon to India in 23 days, but his gifts of hats, cloaks, sugar, and honey drew mockery at the court of the Zamorin.

Leaving India against the monsoon turned a 23 day crossing into more than 90, and scurvy killed so many men that the São Rafael had to be burned. His brother Paulo died too. Yet the small spice cargo proved the route. In 1502 he returned with 15 warships, burned the pilgrim ship Miri with its passengers locked below, mutilated a Brahmin envoy, and shelled Calicut for two days. Sidelined for 20 years, he threatened to defect to Castile, became Count of Vidigueira in 1519, and was sent back as Viceroy by John III in 1524, only to die of malaria in Cochin on Christmas Eve.

• In Mozambique he tried to pass his crew off as Muslims, then fired his cannons into the city as he fled.
• His men told port officials they had come in search of Christians and spices, hoping to find the realm of Prester John.
• The Miri's passengers offered a ransom large enough to free every Christian captive in Fez, and he refused it.
• When an undersea earthquake shook his fleet near Dabhol in 1524, he told the crew that even the sea trembled before them.
• He rests in the Jerónimos Monastery in Lisbon, a building paid for by a tax on the spice trade he opened.

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Trim was born in 1799 aboard HMS Reliance on its voyage from the Cape of Good Hope to Botany Bay. As a kitten he fell overboard, swam back to the hull, and climbed a rope to the deck, earning a place as companion to explorer Matthew Flinders. Flinders described him as black with white paws, a white chin and a white star on his chest, and named him after the loyal Corporal Trim in Laurence Sterne's Tristram Shandy. From 1801 to 1803 Trim sailed on HMS Investigator as Flinders circumnavigated and mapped the Australian mainland, and in 1803 he survived the wreck of HMS Porpoise on Wreck Reef.

Sailing home in 1803 and 1804, Flinders stopped at Mauritius, then the French Isle de France, during the Napoleonic Wars and was arrested as a spy. Trim stayed with him, taking daily walks into town and returning to the cell. When Flinders was moved to a harsher prison, he left Trim with a local French woman and her daughter, and within two weeks the cat vanished. Flinders advertised a reward in the local newspaper, but Trim was never seen again. In 1809, still in solitary confinement, Flinders wrote a detailed biographical tribute to him, the main source for his story.

• A bronze Trim sits on a windowsill behind Flinders's statue at the Mitchell Library in Sydney.
• A statue of Flinders and Trim stands at Euston station in London, with casts at Port Lincoln and Flinders University.
• Another statue marks Flinders's birthplace in Donington, Lincolnshire, with a smaller one in Lincoln Cathedral.
• The Mitchell Library named its cafe after Trim.
• Bryce Courtenay's 2002 novel Matthew Flinders' Cat features Trim and his library statue.

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The Great Barrier Reef stretches over 2,300 kilometers off northeast Australia and covers about 344,400 square kilometers in more than 2,900 reefs and 900 islands, all built by pencil eraser sized coral polyps laying limestone cups. Australia drifting north about seven centimeters a year reached the Coral Sea some 24 million years ago, but the living reef began only about 9,000 years ago as rising seas after the last ice age flooded a coastal plain where Aboriginal Australians had lived for at least 40,000 years. HMS Endeavour ran aground on it on June 11, 1770, and Matthew Flinders mapped and named it in 1802. It hosts 400 coral species, over 1,500 fish species and six of seven sea turtle species.

Corals spawn in mass events cued by water temperature, daylight and the moon. Studies found the reef lost more than half its coral cover between 1985 and 2017 to marine heat waves that make corals expel their zooxanthellae, and acidification is removing aragonite. Over 90 percent of local pollution is farm runoff, and doubling chlorophyll raises crown of thorns starfish larval survival tenfold. Queensland's shark control program killed about 50,000 sharks from 1962 to 2018. Yet in 2022 the Australian Institute of Marine Science recorded the highest coral cover in 36 years in the north and center, led by fast growing Acropora.

• Inner reefs spawn just after the October full moon, outer reefs in November and December.
• The coal carrier Shen Neng 1 ran aground in 2010 and leaked oil onto the reef.
• The 2004 rezoning raised no take zones from about 4.5 percent to over 33 percent.
• The Reef 2050 plan of 2015 has been criticized for lacking binding emissions measures.
• Bird guano under tourist pontoons links to 12 percent coral disease versus 1.1 percent nearby.

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Norwegian ethnographer Thor Heyerdahl believed Polynesia was settled not from Asia but by fair skinned Tiki people who drifted from pre Columbian Peru, pointing to resemblances between Easter Island's moai and Peruvian monoliths and to the Hanau Eepe and Hanau Momoko legend. To prove the drift possible, he built the Kon-Tiki in a Peruvian naval dockyard from nine balsa logs up to 45 feet long, lashed with hemp and no metal, following Spanish conquistador illustrations. Experts said the ropes would chafe through, but the soaked balsa swelled and the wet hemp shrank, tightening the lashings. The crew included wartime radio operators Knut Haugland and Torstein Raaby, navigator Erik Hesselberg, Bengt Danielsson, Herman Watzinger and a parrot named Lorita.

Towed 50 miles out from Callao on April 28, 1947, they drifted 101 days and 4,300 miles, ate flying fish and mahi mahi, survived three rogue waves that washed straight through the logs, and wrecked on the reef at Raroia in the Tuamotus on August 7. Heyerdahl's book became a global bestseller and his film won the 1951 Academy Award for documentary feature. But DNA, linguistic and archaeological evidence shows Polynesians came from island Southeast Asia, and in 1976 the voyaging canoe Hokulea sailed Hawaii to Tahiti by traditional wayfinding against the prevailing winds.

• They carried US Army rations, a sextant and watches, arguing only the raft itself was being tested.
• Their radio, call sign LI2B, reached Oslo on about six watts.
• Sweet potatoes in Oceania suggest contact with South America, likely by Polynesians sailing east.
• William Willis rafted even farther on Seven Little Sisters in 1954.
• The 2006 Tangaroa raft, crewed by grandson Olav Heyerdahl, crossed 30 days faster using guaras.

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Coleridge's painted ship upon a painted ocean made the doldrums a byword for stagnation, but the region is the Intertropical Convergence Zone, a band where the northeast and southeast trade winds collide near the equator and are forced upward as the rising branch of the Hadley cell. Horizontal wind dies at the surface while violent convection builds towering thunderstorms, which is why sailing ships sat becalmed for days or weeks in heat and humidity. Meteorologists called it the intertropical front from the 1920s to the 1940s before renaming it once they found the converging air masses barely differ in temperature. The zone follows the thermal equator, bringing the wet and dry seasons of the tropics.

Over land it distorts, and Asia's summer heating pulls it toward the Himalayas to drive the monsoon, while the South Pacific Convergence Zone can break apart during El Nino. When the band drifts at least five degrees from the equator, the Coriolis force can spin its storms into tropical cyclones. In 2009 Air France Flight 447 flew into ITCZ storms at night, iced its pitot tubes, and crashed with 228 aboard. Titanium in Cariaco Basin sediment off Venezuela records past positions of the zone, which shifted south during Heinrich events and again from the 1950s to the 1980s, likely forced by northern aerosol pollution.

• That southward shift is widely believed to have driven the 1970s and 1980s Sahel droughts.
• Since at least 1979 the Pacific ITCZ has been narrowing and intensifying.
• Seawater under its drying fringes is growing saltier while water under its core freshens.
• CMIP6 models suggest a northward push over the Indian Ocean and East Africa and a southward shift over the eastern Pacific and Atlantic.
• The name inspired the Doldrums where Milo gets stuck in The Phantom Tollbooth.

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Basque sailors called them asesina ballenas, whale killers, and translation flipped the name to killer whale, though the orca is the largest dolphin. Males reach 33 feet and over 10 tons and hear their echolocation clicks through a hollow lower jaw. Pods hunt with local techniques: carousel feeding on Norwegian herring with bubbles and tail slaps, wave washing seals off Antarctic ice floes, and flipping great white sharks into tonic immobility to take their livers. In the North Pacific, fish eating residents live in large, noisy family groups, while mammal eating transients, or Bigg's orcas, hunt in silence. The two have not interbred for hundreds of thousands of years, and a 2024 study proposed splitting them into separate species.

Resident sons and daughters stay with their mothers for life, and females go through menopause and lead for decades as keepers of knowledge; Granny was estimated at 65 to 105 years old. Each pod has its own dialect and even fads, such as wearing dead salmon on their heads. Indigenous peoples of the Pacific Northwest revered orcas, but fishermen shot them, and the US Navy claimed to have killed hundreds off Iceland in 1956. In 1964 Moby Doll, harpooned for a museum model, survived in captivity and proved gentle. Michael Bigg's photo identification revealed fragile family populations.

• By 1970 about a quarter of orcas captured in Puget Sound bore bullet scars.
• Fifty Pacific Northwest orcas were captured for marine parks between 1964 and 1976.
• SeaWorld announced the end of its orca breeding program in 2016.
• PCBs build up in orca blubber through bioaccumulation, harming immune and reproductive systems.
• Southern residents depend on declining Chinook salmon and will not switch to eating seals.