关于纳尔逊的军衔

天海军节度使

一般意义上认为纳尔逊的最高军衔是海军上将，但是百度百科描述他的最高军衔却是白旗海军中将。到底是上将还是中将，白旗（蓝旗）海军中将是什么什么概念？希望高手解答，谢谢！

iron duke

是白旗海军中将，在细分的军衔中第5位。
In Elizabethan times the fleet grew large enough to be organized into squadrons. The admiral’s squadron wore a red ensign, the vice admiral’s white, and the rear admiral’s blue. As the squadrons grew, each was eventually commanded by an Admiral (with Vice Admirals and Rear Admirals commanding sections) and the official titles became Admiral of the White, etc.

The squadrons ranked in order Red, White, and Blue, with admirals ranked according to their squadron:

   1. Admiral of the Red (Admiral of the Fleet)
   2. Admiral of the White
   3. Admiral of the Blue
   4. Vice Admiral of the Red
   5. Vice Admiral of the White
   6. Vice Admiral of the Blue
   7. Rear Admiral of the Red
   8. Rear Admiral of the White
   9. Rear Admiral of the Blue


    * Admiral of the Fleet Sir Peter Parker, 1st Baronet (promoted to Admiral of the Fleet in 1799)
    * Admiral of the Fleet John Jervis, 1st Earl of St Vincent (made Admiral of the Fleet in 1801)
    * Admiral Sir George Cockburn, 10th Baronet (later Admiral of the Fleet, Rear-Admiral of the United Kingdom and First Sea Lord and was also active in War of 1812)
    * Admiral Sir William Cornwallis (later Admiral of the Red and Vice Admiral of the United Kingdom)
    * Admiral George Elphinstone, 1st Viscount Keith (retired as Admiral of the Red)
    * Admiral John James Gambier, 1st Baron Gambier (later promoted to Admiral of the Fleet)
    * Admiral Edward Pellew, 1st Viscount Exmouth (later Vice Admiral of the United Kingdom and Admiral of the Red)
    * Admiral James Saumarez, 1st Baron de Saumarez (later Admiral of the Red, General of Marines and Vice Admiral of the United Kingdom as well as Commander-in-Chief of the Baltic Fleet)
    * Admiral Sir Edward Thornbrough (retired as Admiral of the Red)
    * Vice Admiral Sir Alexander Forrester Inglis Cochrane (acted as Commander-in-Chief of the British Fleet and retired as Admiral of the White in 1824)
    * Vice Admiral Cuthbert Collingwood, 1st Baron Collingwood (died with the rank of Vice Admiral of the Red in 1810)
    * Vice Admiral Eliab Harvey (promoted to full admiral in 1819, knighted in 1825 and retired as Admiral of the White)
    * Vice Admiral Horatio Nelson, 1st Viscount Nelson, 1st Duke of Bronté (died in 1805 with the rank of Vice Admiral of the White)

天海军节度使

非常感谢，不过能把下面一大段英文翻译一下就更好了。