The First Sea Lord and Chief of Naval Staff (1SL/CNS) is the professional head of the United Kingdom's Royal Navy and the whole Naval Service.
 Originally the title was the Senior Naval Lord to the Board of Admiralty when the post was created in 1689.
 The office holder was then re-styled First Naval Lord from 1771.
 The concept of a professional "First Naval Lord" was introduced in 1805 and the title of the First Naval Lord was changed to "First Sea Lord" on the appointment of Sir Jackie Fisher in 1904.
 From 1923 onward, the First Sea Lord was a member of the Chiefs of Staff Committee; he now sits on the Defence Council and the Admiralty Board.
The First Lord of the Admiralty, or formally the Office of the First Lord of the Admiralty, was the political head of the Royal Navy who was the government's senior advisor on all naval affairs and responsible for the direction and control of Admiralty Department as well as general administration of the Naval Service of the United Kingdom, that encompassed the Royal Navy, the Royal Marines and other services.
 It was one of the earliest known permanent government posts, apart from being the political head of the Royal Navy the post holder simultaneously held the title of the President of the Board of Commissioners for Exercising the Office of Lord High Admiral (known as the Board of Admiralty).
 The office of First Lord of the Admiralty existed from 1628 until it was abolished when the Admiralty, Air Ministry, Ministry of Defence and War Office were all merged to form the new Ministry of Defence in 1964.
Admiral Sir Mark Stanhope, {'1': ", '2': ", '3': ", '4': "} (born 26 March 1952) is a retired Royal Navy officer.
 After serving as a submarine commander, he commanded a frigate and then commanded an aircraft carrier on operational patrol off Sierra Leone.
 He went on to be Deputy Supreme Allied Commander Transformation and then Commander-in-Chief Fleet.
 He served as First Sea Lord and Chief of the Naval staff, the professional head of the Royal Navy, from July 2009 to April 2013.
 In this role he advised the British Government on the deployment of naval forces during operations around Libya.
 He was succeeded by Admiral Sir George Zambellas in April 2013.
Her Majesty's Naval Service, also known as the Senior Service, is the United Kingdom's naval warfare and maritime service.
 It consists of the Royal Navy, Royal Marines, Royal Naval Reserve, Royal Marines Reserve and Naval Careers Service.
 The term Naval Service should be distinguished from the "UK Naval Services", which consist of the Naval Service and the Merchant Navy.
 The Naval Service as a whole falls under the command of the Navy Board, which is headed by the First Sea Lord.
 This position is currently held by Admiral Sir Phillip Jones (appointed April 2016).
 The Defence Council delegates administration of the Naval Service to the Admiralty Board, chaired by the Secretary of State for Defence.
Admiral Sir Charles Saunders, KB (c. 1715 – 7 December 1775) was a Royal Navy officer.
 He commanded the fourth-rate HMS "Gloucester" and led her in action at the Second Battle of Cape Finisterre in October 1747 during the War of the Austrian Succession.
 After serving as Commander-in-Chief, Mediterranean Fleet, he took command of the fleet tasked with carrying James Wolfe to Quebec in January 1759 and consolidated the dead general's victory after the Battle of the Plains of Abraham in September 1759 by devoting great energy to keeping the British Army, now under the command of Colonel George Towshend, well supplied during the Seven Years' War.
 He later became Senior Naval Lord and then First Lord of the Admiralty.
Admiral Sir Anthony Hiley Hoskins, {'1': ", '2': ", '3': ", '4': "} (1 September 1828 – 21 June 1901) was a Royal Navy officer.
 As a junior officer, he took part in the Cape Frontier War of 1851 and then saw action at the Battle of Canton in December 1857 and the Battle of Taku Forts in May 1858 during Second Opium War.
 Once promoted to flag officer rank, he acted as Second-in-Command of the Fleet at the bombardment of Alexandria in July 1882 during the Anglo-Egyptian War.
 He went on to be First Naval Lord in September 1891 but in that role took a relaxed view of the size of the Fleet and did not see the need for a large shipbuilding effort on the scale envisaged by some of his colleagues, such as Admiral Sir Frederick Richards and Admiral Sir John Fisher who were concerned about French and German naval expansion.
Admiral Sir Richard Vesey Hamilton, {'1': ", '2': ", '3': ", '4': "} (28 May 1829 – 17 September 1912) was a Royal Navy officer.
 As a junior officer he twice volunteered to take part in missions to search for Sir John Franklin's ill-fated expedition to find the Northwest Passage.
 He also took part in the Battle of Fatshan Creek in June 1857 during the Second Opium War.
 Later in his career he became Commander-in-Chief, China Station and took his fleet into Vladivostok harbour in 1886 and gave the Russians a surprise.
 He became First Naval Lord in July 1889 and in that role he was primarily concerned with implementing the recommendations contained in a report on the disposition of the ships of the Royal Navy many of which were unarmoured and together incapable of meeting the combined threat from any two of the other naval powers ("the Two-power Standard"): these recommendations had been enshrined in the Naval Defence Act 1889.
 He finished his career as President of the Royal Naval College, Greenwich.
Admiral Sir Peircy Brett (1709 – 14 October 1781) was a Royal Navy officer.
 As a junior officer he served on George Anson's voyage around the world and commanded the landing party which sacked and burned the town of Paita in November 1741.
 During the Jacobite rising Brett saw action on the 9 July 1745, when as captain of the fourth-rate HMS "Lion" he exchanged fire with the French ships Elizabeth and the Du Teillay: the Du Teillay at the time was carrying Charles Edward Stuart to Scotland with supplies and funds to support his cause.
 Brett also commanded the third-rate HMS "Yarmouth" at the First Battle of Cape Finisterre in May 1747 during the War of the Austrian Succession.
 He commanded HMS "Cambridge" on the North America and West Indies Station during the Seven Years' War and later became Senior Naval Lord.
 He was also a Member of Parliament, representing the constituency of Queenborough from 1754 until 1774.
Admiral The Hon. Sir Frederick William Grey GCB (23 August 1805 – 2 May 1878) was a Royal Navy officer.
 As a captain he saw action in the First Opium War and was deployed as principal agent of transports during the Crimean War.
 He became First Naval Lord in the Second Palmerston ministry in June 1861 and subsequently published a pamphlet "Admiralty Administration, 1861–1866" describing his reforms which included, inter alia, the notion that all senior naval promotions and appointments should be non-political and should be discussed and agreed by the Naval Members of the Admiralty Board on a collective basis before recommendations were made to the First Lord of the Admiralty.
Vice-Admiral Sir Richard Saunders Dundas, {'1': ", '2': ", '3': ", '4': "} (11 April 1802 – 3 June 1861) was a Royal Navy officer.
 As a captain, he took part in the capture of the Bogue forts in January 1841, during the First Opium War.
 He was appointed to the command of the Fleet in the Baltic Sea, in succession to Sir Charles Napier, in February 1855 and led the naval support during the latter stages of the Crimean War, enforcing a strict blockade and carrying out the bombardment of Sveaborg in August 1855.
 He was appointed First Naval Lord in the second Palmerston ministry in November 1857 and then, after stepping down to be Second Naval Lord during the third Derby ministry, he stepped up again to become First Naval Lord in the third Palmerston ministry in June 1859 remaining in office until his death.
 The Prime-Minister (Viscount Palmerston) described Dundas as "a most distinguished officer".

Question: Admiral Sir Charles Saunders, was a Royal Navy officer, and he later became which professional head of the United Kingdom's Royal Navy and the whole Naval Service, and originally the title was the Senior Naval Lord to the Board of Admiralty when the post was created in 1689?
Answer: First Sea Lord and Chief of Naval Staff