Merchant Navy (United Kingdom)

The Merchant Navy is the maritime register of the United Kingdom, and describes the seagoing commercial interests of UK-registered ships and their crews. Merchant Navy vessels fly the Red Ensign and are regulated by the Maritime and Coastguard Agency (MCA). King George V bestowed the title of "Merchant Navy" on the British merchant shipping fleets following their service in the First World War; a number of other nations have since adopted the title.

The Merchant Navy has been in existence for a significant period in British history, owing much of its growth to British imperial expansion. As an entity in itself it can be dated back to the 17th century, where an attempt was made to register all seafarers as a source of labour for the Royal Navy in times of conflict. That registration of merchant seafarers failed, and it was not successfully implemented until 1835. British ships were also deeply involved in acts of piracy and armed robbery on the high seas, off the waters of Europe and Caribbean, as ships with British sailors robbed from ships of foreign navies. The merchant fleet grew over successive years to become the world's foremost merchant fleet, benefiting considerably from trade with British possessions in India and the Far East. The lucrative trade in sugar, contraband (opium to China), spices and tea (carried by ships such as the Cutty Sark) helped to solidify this dominance in the 19th century.

In the First and Second World Wars, the Merchant Service suffered heavy losses from German U-boat attacks. A policy of unrestricted warfare meant that merchant seafarers were also at risk of attack from enemy ships. The tonnage lost to U-boats in the First World War was around 7,759,090 tons, and around 14,661 merchant seafarers were killed. In honour of the sacrifice made by merchant seafarers in the First World War, George V granted the title "Merchant Navy" to the service.

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