| | | | |
| William Fanshawe Martin R.N. | Explanation |
| Eldest son of Admiral of the Fleet Sir Thomas Byam Martin, comptroller of the navy |
| |
| Date (from) | (Date to) | Personal |
| 5 December 1801 | | Born |
| 24 July 1826 | | Married, firstly, Hon. Anne Best (died 1836), daughter of Lord Wynford, Lord Chief Justice of the Court of Commion Pleas |
| 21 May 1838 | | Married, secondly, Sophia, daughter of Richard Hurt, of Wirksworth, derbyshire |
| 28 June 1861 | | K.C.B. (Knight Commander of the Bath) |
| 4 December 1863 | | Succeeded as 4th Baronet Martin of Lockynge, Berkshire |
| 24 May 1873 | | G.C.B. (Knight Grand Cross of the Bath) |
| 24 March 1895 | | Died |
| |
| Date | Rank |
| 15 June 1813 | Entered Navy |
| 15 December 1820 | Lieutenant |
| 8 February 1823 | Commander |
| 5 June 1824 | Captain |
| 28 May 1853 | Rear-Admiral |
| 13 February 1858 | Vice-Admiral |
| 14 November 1863 | Admiral |
| 1 April 1870 | Retired Admiral |
| |
| Date from | Date to | Service |
| 15 November 1826 | 1831 | Captain in Samarang, Mediterranean |
| 19 July 1844 | 31 January 1845 | Captain in Queen (until paying off), flagship of Vice-Admiral John Chambers White, Sheerness |
| 30 January 1845 | 18 October 1845 | Captain in Trafalgar, Sheerness, flagship of Vice Admiral John Chambers John Chambers White then (April) Vice Admiral Edward Durnford King (and 1845 experimental squadron) |
| 7 December 1847 | 21 December 1849 | Captain in Prince Regent, Channel squadron |
| 21 December 1849 | 18 May 1852 | Commodore in Prince Regent, Channel squadron |
| 23 November 1853 | 1857 | Rear-admiral Superintendent of Portsmouth Dockyard (flag in St Vincent) |
| 8 March 1858 | 28 June 1859 | Commissioner of the Admiralty (1st Naval Lord) |
| 19 April 1860 | 20 April 1863 | Commander-in-chief, Mediterranean (flag in Marlborough) |
| 26 October 1866 | 1 November 1869 | Commander-in-chief, Devonport |