Admiral is one of the highest ranks in some navies. In the Commonwealth nations and the United States, a "full" admiral is equivalent to a "full" general in the army or the air force, and is above vice admiral and below admiral of the fleet, or fleet admiral.
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.
Rear admiral is a senior naval flag officer rank, equivalent to a major general and air vice marshal and above that of a commodore and captain, but below that of a vice admiral.
A general officer is an officer of high rank in the armies, and in some nations' air forces, space forces, and marines or naval infantry.
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. Other than honorary appointments, no new admirals of the fleet have been named since 1995, and no honorary appointments have been made since 2014.
Air vice-marshal (AVM) is a two-star air officer rank which originated in and continues to be used by the Royal Air Force. The rank is also used by the air forces of many countries which have historical British influence and it is sometimes used as the English translation of an equivalent rank in countries which have a non-English air force-specific rank structure.
A flag officer is a commissioned officer in a nation's armed forces senior enough to be entitled to fly a flag to mark the position from which the officer exercises command.
Schout-bij-nacht is a Dutch Naval rank, with a NATO rank of OF-7.
Admiral is a senior rank of the Royal Navy, which equates to the NATO rank code OF-9, outranked only by the rank of admiral of the fleet. Royal Navy officers holding the ranks of rear admiral, vice admiral and admiral of the fleet are sometimes considered generically to be admirals. The rank of admiral is currently the highest rank to which a serving officer in the Royal Navy can be promoted, admiral of the fleet being in abeyance except for honorary promotions of retired officers and members of the Royal Family.
Admiral of the fleet (AF) is the highest rank in the Royal Australian Navy (RAN), but is a ceremonial, not active or operational, rank. It equates to the NATO rank grade OF-10. Equivalent ranks in the other services of the Australian Defence Force are field marshal and marshal of the Royal Australian Air Force. Like those ranks, admiral of the fleet is a five-star rank.
Lieutenant general, formerly more commonly lieutenant-general, is a senior rank in the British Army and the Royal Marines. It is the equivalent of a multinational three-star rank; some British lieutenant generals sometimes wear three-star insignia, in addition to their standard insignia, when on multinational operations.
The Indonesian National Armed Forces (TNI) uses a simplified ranking system for the three branches of Indonesian Army, Indonesian Navy and Indonesian Air Force. Most of the ranks are similar with differences for the rank titles of the high-ranking officers. Exception exists, however, in the ranks of the service members of the Indonesian Marine Corps. While Indonesian Marine Corps is a branch of the Navy, the rank titles of the Marine Corps are the same as those of the Army, but it still uses the Navy's style insignia.
The Military ranks of the Netherlands armed forces are the military insignia used by the armed forces of the Netherlands.
A five-star rank is the highest military rank in many countries. The rank is that of the most senior operational military commanders, and within NATO's standard rank scale it is designated by the code OF-10. Not all armed forces have such a rank, and in those that do the actual insignia of the five-star ranks may not contain five stars. For example: the insignia for the French OF-10 rank maréchal de France contains seven stars; the insignia for the Portuguese marechal contains four gold stars. The stars used on the rank insignias of various Commonwealth of Nations are sometimes referred to colloquially as pips, but are stars of the orders of the Garter, Thistle or Bath or Eversleigh stars depending on the wearer's original regiment or corps, and are used in combination with other heraldic items, such as batons, crowns, swords or maple leaves.
The following tables present the ranks and insignia of the Sri Lanka Navy. These ranks are similar to Royal Naval officer ranks and the ratings ranks. Sri Lanka does have an Admiral rank, but it is usually only awarded to the Chief of Defence Staff (CDS) or as an honorary rank; Admiral Wasantha Karannagoda was the only Sri Lankan naval officer to hold a full admiral rank while in active service.
Vice admiral is the second-highest active rank of the Royal Australian Navy (RAN). It is a three-star rank, and was created as a direct equivalent of the British rank of vice admiral. The rank is held by the Chief of Navy and, when the positions are held by navy officers, by the Vice Chief of the Defence Force, the Chief of Joint Operations, the Chief of Joint Capabilities, or equivalent position.
Jan Hendrik van Kinsbergen, Count of Doggerbank, was a Dutch naval officer. Having had a good scientific education, Van Kinsbergen was a proponent of fleet modernization and wrote many books about naval organization, discipline and tactics.
Johannes Theodorus Furstner was a Dutch naval officer and politician. Reaching the rank of lieutenant admiral, he served as Minister of the Navy during World War II in the Second Gerbrandy cabinet.
Robert Peter Bauer is a Dutch lieutenant admiral in the Royal Netherlands Navy, currently serving as the Chair of the NATO Military Committee since June 2021. He previously served as Chief of Defence from October 2017 to April 2021, and as the Vice Chief of Defence of the Armed forces of the Netherlands from 1 September 2015 to 13 July 2017.
Vice Admiral is a three-star commissioned armed flag officer rank in the Pakistan Navy, coast guards, and marines awarded by the Government of Pakistan to rear admirals as a position advancement in uniformed service. It is the second-highest rank in Pakistan armed services with a NATO code of OF-8, and while it is worn on epaulettes with a three-star insignia, it ranks above two-star rank Rear Admiral and below four-star rank Admiral. Vice admiral is equivalent to the rank of Lieutenant general of Pakistan Army and Air marshal of the Pakistan Air Force.
Netherlands 
Royal Netherlands Navy 