Fourth Sea Lord

Office of the Chief of Materiel (Fleet)
Ensign of the Royal Navy
Incumbent Vice Admiral Sir Christopher Gardner since 2019
Department of the Admiralty, Ministry of Defence
Member of	Board of Admiralty, Admiralty Board, Navy Board
Reports to	First Sea Lord
Nominator	First Lord of the Admiralty, Secretary of State for Defence
Appointer	Prime Minister Subject to formal approval by the King-in-Council
Term length	Not fixed (typically 1–3 years)
Inaugural holder	Captain George Barrington
Formation	1830–1964, 1965–current

The Fourth Sea Lord and Chief of Naval Supplies, originally known as the Fourth Naval Lord, was formerly one of the Naval Lords and members of the Board of Admiralty, which controlled the Royal Navy of the United Kingdom. The post is currently known as Chief of Materiel (Fleet). As of 2017, it is also known as Chief of Fleet Support, Chief of Materiel (Ships), then as of 2020, Director General Ships.