Admiral of the Fleet Sir Charles Frederick Hotham was a Royal Navy officer. As a junior officer, he was a member of the naval brigade that fought the Māori people at the Battle of Rangiriri during the invasion of the Waikato and was also present at the Battle of Gate Pā during the Tauranga Campaign. He later took part in the bombardment of Alexandria during the Anglo-Egyptian War and then went ashore as Chief of Staff of the naval brigade, formed under Admiral Sir Beauchamp Seymour, which was dispatched to restore the authority of Khedive Tewfik Pasha in the face of Ahmed ‘Urabi's nationalist uprising against the administration.

Admiral of the Fleet is a five-star naval officer rank and the highest rank of the Royal Navy, formally established in 1688. The five-star NATO rank code is OF-10, equivalent to a field marshal in the British Army or a Marshal of the Royal Air Force. Apart from honorary appointments, no new admirals of the fleet have been named since 1995, and no honorary appointments have been made since 2014.