Commodore is a senior naval rank used in many navies which is equivalent to brigadier or brigadier general and air commodore. It is superior to a navy captain, but below a rear admiral. It is either regarded as the most junior of the flag officers rank or may not hold the jurisdiction of a flag officer at all depending on the officer's appointment. Non-English-speaking nations commonly use the rank of flotilla admiral, counter admiral, or senior captain as an equivalent, although counter admiral may also correspond to rear admiral lower half abbreviated as RDML.
Vice admiral is a senior naval flag officer rank, usually equivalent to lieutenant general and air marshal. A vice admiral is typically senior to a rear admiral and junior to an admiral.
The chairman of the Joint Chiefs of Staff (CJCS) is the presiding officer of the Joint Chiefs of Staff (JCS). The chairman is the highest-ranking and most senior military officer in the United States Armed Forces and the principal military advisor to the president, the National Security Council, the Homeland Security Council, and the secretary of defense. While the chairman of the Joint Chiefs of Staff outranks all other commissioned officers, the chairman is prohibited by law from having operational command authority over the armed forces; however, the chairman assists the president and the secretary of defense in exercising their command functions.
The First Sea Lord, officially known as the First Sea Lord and Chief of Naval Staff (1SL/CNS) is a statutory position in the British Armed Forces, usually held by an admiral. As the highest-ranking officer to serve in the Royal Navy, the chief is the principal military advisor on matters pertaining to the navy and a deputy to the Secretary of State for Defence. In a separate capacity, the CNS is a member of the Chiefs of Staff Committee and, thereby, a military advisor to the National Security Council, the prime minister and the monarch. The First Sea Lord is typically the highest-ranking officer on active duty of the Royal Navy unless the Chief of the Defence Staff is a naval officer. Admiral Ben Key was appointed First Sea Lord in November 2021.
The title chief of staff identifies the leader of a complex organization such as the armed forces, institution, or body of persons and it also may identify a principal staff officer (PSO), who is the coordinator of the supporting staff or a primary aide-de-camp to an important individual, such as a president, or a senior military officer, or leader of a large organization.
The Chief of the Defence Force (CDF) is the highest-ranking and most senior military officer in the Australian Defence Force (ADF) and is the principal military advisor to the National Security Committee and the Minister for Defence. The current Chief of the Defence Force is Admiral David Johnston, who took office on 10 July 2024.
The Chief of the Naval Staff (CNS) is a statutory office held by the professional head of the Indian Navy (IN), the naval branch of the Indian Armed Forces. Customarily held by a four-star admiral, the CNS is the senior-most operational officer of the IN, tasked with the roles of overseeing the force's overall functioning during states of peace and conflict, along with the realization of India's strategic maritime objectives, namely, the defence of the country's sovereignty against maritime threats and the security of international sea lines in the Indo-Pacific.
The Nigerian Navy (NN) is the naval branch of the Nigerian armed forces. With more than 70 warships, it is categorised as the fourth strongest navy in Africa. It is considered well-trained and has participated in several peacekeeping missions.
The Chief of the Defence Staff (CDS) is the most senior appointment in the Sri Lankan Armed Forces, and the highest-ranking military officer in service, outranking the heads of each service branch. The CDS does not, however, have operational command authority over service branches, but rather oversees inter-service co-operation and develops and implements the joint operations doctrine of the Sri Lankan armed forces. Coordination of inter-service joint operations are handled by the Office of the Chief of the Defence Staff, formally known as the Joint Operations Headquarters.
The Chief of the Naval Staff is a military appointment and a Statutory office held by a four-star admiral in the Pakistan Navy, who is nominated and appointed by the Prime Minister of Pakistan and confirmed by the President of Pakistan.
The National Defence College, located in New Delhi, is the defence service training institute and highest seat of strategic learning for officers of the Defence Service and the Civil Services. This is a very prestigious course attended only by a few hand-picked defence officers of One-Star rank and civil servants of the rank of Joint secretary to the Government of India. Each year, approximately 25 officers from friendly foreign countries like the US, UK, Canada, France, Germany, Australia, Vietnam, Sri Lanka, Nepal, UAE and others attend the course.
Admiral Zafar Mahmood AbbasiNI(M) HI(M) SI(M) BJSN is a retired four-star admiral of the Pakistan Navy who served as the 16th Chief of the Naval Staff (CNS) of Pakistan Navy from 7 October 2017 until 7 October 2020.
Vice Admiral Mathew Quashie was a Ghanaian naval officer and was the twenty-ninth Chief of Defence Staff of the Ghana Armed Forces. He also served as the Chief of Naval Staff of the Ghana Navy from 3 April 2009 to 28 March 2013.
Dele Joseph EzeobaGSS fwc MSc MRIN FCIS is a retired vice admiral in the Nigerian Navy who was the 20th Chief of the Naval Staff. Prior to that appointment, he served as Deputy Commandant at the Armed Forces Command and Staff College (AFCSC), Jaji, Nigeria.
Usman Oyibe Jibrin, GSS AM psc(+) mni LLB PGCPA is a Nigerian Navy vice admiral and the 21st Chief of the Naval Staff. Prior to his appointment as Chief of the Naval Staff, he was the Chief of Logistics and Director of Training, Defence Headquarters Abuja.
Admiral Sir Antony David Radakin, is a senior Royal Navy officer. He was appointed Chief of the Defence Staff, the professional head of the British Armed Forces, in November 2021. Radakin was previously the First Sea Lord, the professional head of the Naval Service from June 2019 to November 2021. He was Chief of Staff, Joint Forces Command, from 2016 to 2018, and the Second Sea Lord and Deputy Chief of the Naval Staff from 2018 to 2019. He was appointed Lord High Constable of England in 2023, and in that role took part in the Coronation of Charles III and Camilla.
The chief of army staff (COAS) has been the title of the professional head of the Nigerian Army since 1966. Prior to 1966, the title was General Officer Commanding, Nigerian Army (GOCNA). Since 1980, the post has been immediately subordinate to the chief of defence staff, the post held by the head of the Nigerian Armed Forces. The position is often occupied by the most senior officer appointed by the president.
Ibok-Ete Ekwe Ibaspsc+ GSS AM ndc MSc is a retired Nigerian Navy vice admiral, who was the 22nd Chief of the Naval Staff (CNS) of the Nigerian Navy from 2015 to 2021.
Vice Admiral Jonas Björnson Haggren is a senior officer in the Swedish Navy. From 1 July 2023, he serves as Swedish Military Representative to the EU and NATO in Brussels. Prior to that, Haggren served as the Chief of Defence Staff and head of the Swedish Armed Forces Headquarters in Stockholm from 2018 to 2022 and as Chief of Policy and Plans Department from 2014 to 2018.
Vice Admiral Seth Amoama was the Chief of the Defence Staff (CDS) of the Ghana Armed Forces. He was appointed by President Akufo Addo in January 2021 and retired effective January 2024. He replaced Lieutenant General Obed Akwa, who retired at the start of February 2021. Prior to that he was the Chief of Naval Staff of the Ghana Navy appointed since 2019.
Nigerian Navy 
