The impossibility of keeping Englishmen sober ashore was a constant source of complaint, It was the great weakness of 16th century English infantrymen, whose performance when sober was admired even by the Spaniards. Already it was true, as it was to be for centuries, that many saw and despised the drunken sailor ashore, but few knew and admired him at his work afloat.

In every age states of varying size and constitution and at every level of development have found naval warfare to be one of their most formidable and expensive tasks. Ships have always been large, costly and complicated, and warships much more complicated and costly than any others. Scholars are nowadays inclined to emphasize the power, wealth and sophistication of the Anglo-Saxon kingdoms, and there is not more striking illustration of this than the advanced and elaborate administrative structures of the early English navy.

'A Naval History of Britain' which begins in the 7th century has to explain what it means by Britain. My meaning is simply the British Isles as a whole, but not any particular nation or state or our own day... 'Britain' is not a perfect word for this purpose, but 'Britain and Ireland' would be both cumbersome and misleading, implying an equality of treatment which is not possible. Ireland and the Irish figure often in this book, but Irish naval history, in the sense of the history of Irish fleets, is largely a history of what might have been rather than what actually happened.

Naval dominance of European waters was the largest, longest, most complex and expensive project ever undertaken by the British state and society.

The impossibility of keeping Englishmen sober ashore was a constant source of complaint, It was the great weakness of 16th century English infantrymen, whose performance when sober was admired even by the Spaniards. Already it was true, as it was to be for centuries, that many saw and despised the drunken sailor ashore, but few knew and admired him at his work afloat.

Whether in peaceful trade or warlike attack, the sea unites more than it divides. Even if it were possible to treat England, or the British Isles, as a single, homogenous, united nation, it would still be impossible to write its naval history without reference to the histories of the other nations, near and far, with which the sea has connected it.

The common sense of the word (navy) as we use it today refers to a permanent fighting service made up of ships designed for war, manned by professionals and supported by an adminsistrative and technical infrastructure. A navy in this sense is only one possible method of making war at sea, and by some way the most difficult and the most recent. There have in the past been, and to some extent still are, many other ways of generating sea power.