In the 18th century, British sailors relied heavily on rum as a crucial part of their rations, receiving a pint daily from the Royal Navy since the 1650s. However, as time went on, sailors began to mix their rum with three other ingredients: water, sugar, and lime juice, leading to what some consider the earliest version of a cocktail.

The transition from beer and wine to rum was influenced by Britain’s establishment of a colony in Jamaica, which made rum more readily available. Despite its popularity, the higher alcohol content of rum often led to problematic behavior among sailors, who sometimes saved their rations to drink multiple servings at once, risking their ability to perform their duties.

In 1740, Vice Admiral Edward Vernon recognized the need for moderation. He mandated that sailors dilute their rum with water and permitted the addition of limes and sugar for flavor. This concoction soon became known as "grog," derived from Vernon’s nickname, which referred to his grogram-fabric cloak.

Interestingly, while citrus was used in grog, it wasn’t initially for health reasons. The connection between citrus and scurvy prevention was not established until later. It wasn’t until 1747 that James Lind’s experiment aboard the HMS Salisbury demonstrated that citrus could combat scurvy, a disease caused by vitamin C deficiency. Lemons, not limes, became a required supply on ships in 1795, long after the adoption of grog.

For those curious to experience the traditional drink of 18th-century British sailors, recreating grog is straightforward. The traditional mixture involves four parts water to one part rum, with sugar and lime juice added to taste. Pusser’s rum is noted as a practical choice for this classic drink, resembling the rum served by the Royal Navy until its official ration was discontinued in 1970.

Today, sailing and naval life have evolved significantly compared to the 1700s. Modern conditions are vastly improved, eliminating the necessity of the limited diets that sailors once faced, such as dried fish and hardtack. Nevertheless, the basic ingredients of water, sugar, and lime in rum echo through the cocktails enjoyed by some contemporary sailors.