From Wikipedia

Empire of the Seas
Episode Three

High Tide

Throughout the 18th and 19th centuries the Royal Navy was the largest in the world, but until 1805 its forces were repeatedly matched or exceeded in numbers by a combination of enemies. Despite this it was able to maintain an almost uninterrupted ascendancy over its rivals through superiority in financing, tactics, training, organisation, social cohesion, hygiene, dockyard facilities, logistical support and, from the middle of the 18th century, warship design and construction.