What Did Sailors Eat in the Age of Sail?
To sail a wooden warship or merchantman across an ocean in the 17th, 18th, or early 19th century was to gamble your life against your food supply. Fresh provisions rotted within days; a voyage could last months with no land in sight. What kept crews alive was a diet built entirely around preservation — monotonous, often unpleasant, and occasionally deadly in its own right.
Ship's Biscuit: the Edible Foundation
The staple was ship's biscuit, also called hardtack — a flat, rock-hard cake of flour and water baked until almost all moisture was gone, so it could last for years. Sailors soaked it in liquid or cracked it against the table to make it chewable. Its great enemy was time: stored biscuit became riddled with weevils and grubs, which sailors dislodged by tapping the biscuit or simply ate in the dark to avoid seeing them. A well-made biscuit, kept dry, could survive a decade — which is precisely why it fed the world's navies for centuries.
Salt Horse and Pease
Protein came from salt beef and salt pork, packed in barrels of brine so strong the meat could keep for years. It was so tough and briny that sailors nicknamed it "salt horse," and it had to be steeped in water — sometimes towed overboard in a net — before it was even edible. Alongside it came dried peas, boiled into a thick "pease" pudding or soup; oatmeal cooked into a gruel called burgoo; and rations of cheese and butter that were frequently rancid by the time they were opened. Certain days of the week were "banyan days," meatless by regulation, when the crew made do with cheese, biscuit, and pease.
The Daily Ration
Navies fed their crews by a fixed scale. The Royal Navy allowance, for instance, granted each man a set weekly quota — roughly a pound of biscuit a day, gallons of beer, and measured portions of salt meat, pease, oatmeal, butter, and cheese rotated across the week. It was, on paper, more calories than many labourers ashore received, which made naval service attractive despite its dangers. In practice, quality was another matter, and the purser who managed the stores was widely suspected of shorting the men to line his own pockets — a grievance behind many a shipboard quarrel.
The Daily Drink — and Grog
Water stored in wooden casks quickly turned foul and slimy, so ships carried alcohol as a safer, morale-boosting alternative. The Royal Navy issued beer, and on long voyages rum. In 1740 Admiral Edward Vernon, worried about drunkenness, ordered the rum diluted with water — a mixture that took his nickname "Old Grog" and became famous as grog. Watered, and later dosed with lemon or lime juice and sugar, the daily tot was one of the few pleasures of shipboard life, doled out at the call of "up spirits" with a ceremony the crew guarded jealously.
The Great Killer: Scurvy
The deadliest thing about the sailor's diet was what it lacked. Months without fresh fruit or vegetables brought on scurvy — a vitamin C deficiency that caused bleeding gums, reopening wounds, rotting teeth, exhaustion, and death. On long voyages of exploration, scurvy could kill more men than storms, shipwreck, and enemy action combined.
The turning point came in 1747, when naval surgeon James Lind ran one of history's first controlled clinical trials aboard HMS Salisbury and found that sailors given oranges and lemons recovered dramatically. Adoption was frustratingly slow — it took decades and the advocacy of physicians like Gilbert Blane before, by the end of the 18th century, the Royal Navy issued citrus juice as standard. The change transformed sea power and earned British sailors the enduring nickname "limeys." Captain James Cook, meanwhile, kept scurvy at bay on his Pacific voyages partly by insisting his crews eat sauerkraut and other antiscorbutics — and by ruthlessly enforcing cleanliness and diet.
Mess, Galley, and the Cook
Food organised shipboard life. Crews were divided into messes of roughly eight men who drew rations, cooked, and ate together, taking turns as "mess cook" to prepare the group's food and carry it to and from the ship's galley stove. The ship's cook himself was often a disabled or pensioned sailor rewarded with the post rather than a trained chef, and the great iron galley stove boiled most food in vast coppers — which is why boiling dominated the shipboard menu. When a ship reached port, everything changed: fresh meat, vegetables, and water came aboard, and livestock were sometimes carried live to be slaughtered at sea for the officers' table.
The Officers' Table and Fresh Food
Not everyone aboard ate alike. While the lower deck lived on biscuit and salt horse, officers — and especially the captain — kept their own stores, dined off private provisions, and often carried live animals: hens for eggs, pigs, goats for milk, even a cow on a large enough ship, penned in the waist and slaughtered as needed. A captain's table might feature fresh meat, soft bread, wine, and preserves that the ordinary sailor never saw, and an invitation to dine with the officers was a real privilege.
Fresh food, when it came, was seized eagerly by all. In port, ships took on vegetables, fresh meat, and water; at sea, crews fished, caught seabirds, and — on tropical voyages — prized turtles, which could be kept alive on deck for weeks and gave fresh meat far from land. Navies also experimented with preserved antiscorbutics like "portable soup," a dried stock cake that was an early convenience food, and with sauerkraut and lemon juice. These fresh and experimental foods were the difference between a healthy crew and a floating hospital, and good captains guarded their men's diet as closely as their gunpowder.
Endurance in a Barrel
The sailor's diet was grim, but it was also a triumph of preservation that made global voyaging possible at all. Biscuit, salt meat, dried peas, and a tot of grog were not appetising, but they travelled — and once the scurvy puzzle was solved, they let ships cross oceans and stay at sea for months on end. Much of the Age of Exploration and empire floated, quite literally, on salt and hardtack, and the humble ship's biscuit deserves its place among the foods that changed the world.
Source note
This account draws on naval victualling records, sailors' journals and memoirs, and the work of maritime historians on shipboard life and health. Rations differed between navies, merchant services, and eras, and the fight against scurvy in particular unfolded slowly and unevenly, despite Lind's early evidence — the science of vitamins that explained why citrus worked would not arrive until the 20th century.
Frequently asked questions
What did sailors eat in the Age of Sail?
The staples were rock-hard ship's biscuit (hardtack), salt beef and salt pork ('salt horse') from the brine barrel, dried peas, oatmeal, and cheese — all chosen to survive months at sea without refrigeration.
What was grog?
Grog was rum diluted with water, introduced in 1740 by Admiral Edward Vernon (nicknamed 'Old Grog') to curb drunkenness. Later dosed with lemon or lime juice and sugar, the daily tot was one of the few pleasures of shipboard life.
How did sailors get scurvy, and how was it cured?
Scurvy came from months without fresh fruit or vegetables (a lack of vitamin C). In 1747 the naval surgeon James Lind showed that oranges and lemons cured it; by the end of the 18th century the Royal Navy issued citrus juice, earning British sailors the nickname 'limeys'.
Were there weevils in ship's biscuit?
Yes. Stored biscuit often became riddled with weevils and grubs, which sailors dislodged by tapping the biscuit on the table — or simply ate in the dark to avoid seeing them.
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