She was born in 1925 on the Baltic coast, built by the Ostseewerft yard at Frauendorf - now Golęcino, in Poland - and christened Bragi. For a few years she hauled freight across the Baltic Sea. Sold in 1926, she became the Bostonlines under a Hamburg owner. Then, in 1928, the Chilean Navy bought her and sent her south across the Atlantic with a hold full of ammunition for the battleship Almirante Latorre. The plan was to scrap her on arrival. Instead, like a worn-out ship given an unexpected second life, she was refitted as a supply vessel for the Punta Arenas region, carrying provisions to the colonists scattered through some of the emptiest country on Earth.

In 1931, the Chilean fleet rose in revolt. Sailors across the navy, angered by Depression-era pay cuts, seized their own ships - and the Micalvi was among them. Anchored at Talcahuano under Lieutenant Commander Pedro Espina Ritchie, her crew joined the insurrection and turned the vessel over to the rebels. She was ordered to sail to the coal-mining town of Lota and ferry miners to swell the uprising. It never happened. When she arrived, the Carabineros - then a mounted army police force - seized the would-be reinforcements before they could embark. The mutiny collapsed within days, and the Micalvi returned to her quiet supply runs at the bottom of the continent.

Her most consequential act was also one of her smallest. In 1958, the Micalvi's crew built a modest lighthouse on the tiny islet of Snipe, in the contested eastern Beagle Channel, to make the passage safer. The beacon went up on 1 May - and lit a diplomatic fuse. Argentina, which disputed the surrounding waters, sent warships. The Argentine Navy shelled the Chilean beacon and landed an infantry company on the uninhabited rock. The Snipe incident passed without deaths, but it was an early tremor of the Beagle conflict, the border dispute that would bring the two nations to the brink of war two decades later before a papal mediation pulled them back.

The Micalvi was decommissioned in 1961 and anchored at Puerto Williams, declared a historic ship and naval museum. But museums need visitors, and there are not many this far south. So her keepers did something better. They settled her into a protected caleta, added showers and toilets and electrical outlets for visiting crews, and built a bar into her bones. Since 2007 she has served officially as the clubhouse of the Club de Yates Micalvi - the world's southernmost yacht club. For sailors bound for or back from Cape Horn, she is a ritual stop: the warm, lamplit last word of civilization before the Drake Passage, her walls layered with the burgees and signatures of everyone mad enough to sail here.

Geography is what gives the old steamer her meaning. Puerto Williams sits on the Beagle Channel almost as far south as people permanently live, the final sheltered harbor before the open water that has wrecked countless ships rounding the Horn. A crew bound for that passage knows there is nothing kind ahead - just the Drake, the williwaws, and the cold. So they tie up alongside the Micalvi, climb aboard a vessel that has spent a century being repurposed for whatever the moment required, and add their names to the list. There is something fitting in it. A ship built to scrape a living on the Baltic, nearly scrapped, caught in a mutiny, dragged into a border dispute, has ended her days as a place of welcome at the edge of the inhabited world.