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First lieutenant is a commissioned officer
military rank Military ranks are a system of hierarchical relationships, within armed forces, police, intelligence agencies or other institutions organized along military lines. The military rank system defines dominance, authority, and responsibility in ...
in many armed forces; in some forces, it is an appointment. The rank of lieutenant has different meanings in different military formations, but in most forces it is sub-divided into a senior (first lieutenant) and junior (second lieutenant) rank. The
NATO The North Atlantic Treaty Organization (NATO, ; french: Organisation du traité de l'Atlantique nord, ), also called the North Atlantic Alliance, is an intergovernmental military alliance between 30 member states – 28 European and two N ...
equivalent rank for land force officers is OF-1 rank. In navies, while certain rank insignia may carry the name lieutenant, the term may also be used to relate to a particular post or duty, rather than a rank.


Indonesia

In
Indonesia Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania between the Indian and Pacific oceans. It consists of over 17,000 islands, including Sumatra, Java, Sulawesi, and parts of Borneo and New Gui ...
, "first lieutenant" is known as ''Letnan Satu'' (''Lettu''), Indonesian National Armed Forces uses this rank across all three of its services. It is just above the rank of second lieutenant and just below the rank of captain.


Israel

In the Israel Defense Forces, the rank above second lieutenant is simply lieutenant. The rank of (קצין מקצועי אקדמאי (קמ"א (''katsín miktsoí akademai'' or "kama"), a professional academic officer (that is, a medical, dental or veterinary officer, a justice officer or a religious officer), is equivalent to a professional officer of the second class in the reserve and equivalent to first lieutenant.


United Kingdom


British Army

In the
British Army The British Army is the principal land warfare force of the United Kingdom, a part of the British Armed Forces along with the Royal Navy and the Royal Air Force. , the British Army comprises 79,380 regular full-time personnel, 4,090 Gurkha ...
and Royal Marines, the rank above second lieutenant is simply lieutenant (pronounced ''lef-tenant''), with no ordinal attached. Before 1871, when the whole British Army switched to using the current rank of "lieutenant", the
Royal Artillery The Royal Regiment of Artillery, commonly referred to as the Royal Artillery (RA) and colloquially known as "The Gunners", is one of two regiments that make up the artillery arm of the British Army. The Royal Regiment of Artillery comprises t ...
, Royal Engineers and fusilier
regiment A regiment is a military unit. Its role and size varies markedly, depending on the country, service and/or a specialisation. In Medieval Europe, the term "regiment" denoted any large body of front-line soldiers, recruited or conscript ...
s used "first lieutenant" and "second lieutenant".


Royal Navy

The ''first lieutenant'' (often abbreviated "1st Lt") in a
Royal Navy The Royal Navy (RN) is the United Kingdom's naval warfare force. Although warships were used by English and Scottish kings from the early medieval period, the first major maritime engagements were fought in the Hundred Years' War against Fr ...
ship is a post or appointment, rather than a rank. Historically the lieutenants in a ship were ranked in accordance with seniority, with the most senior being termed the first lieutenant and acting as the second-in-command, unless the ship was complemented with a commander. Although lieutenants are no longer ranked by seniority, the post of "first lieutenant" remains. In minor war vessels, destroyers, frigates, and submarines, the ''first lieutenant'' is second in command, executive officer (XO) and head of the executive branch; in larger ships where a commander of the warfare specialization is appointed as the executive officer, a ''first lieutenant'' is appointed as their deputy. The post of ''first lieutenant'' in a shore establishment carries a similar responsibility to the ''first lieutenant'' of a
capital ship The capital ships of a navy are its most important warships; they are generally the larger ships when compared to other warships in their respective fleet. A capital ship is generally a leading or a primary ship in a naval fleet. Strategic im ...
. Colloquial terms in the
Royal Navy The Royal Navy (RN) is the United Kingdom's naval warfare force. Although warships were used by English and Scottish kings from the early medieval period, the first major maritime engagements were fought in the Hundred Years' War against Fr ...
for the ''first lieutenant'' include " number one", "the jimmy" (or "jimmy the one") and "James the First" (a back-formation referring to
James I of England James VI and I (James Charles Stuart; 19 June 1566 – 27 March 1625) was King of Scotland as James VI from 24 July 1567 and King of England and Ireland as James I from the union of the Scottish and English crowns on 24 March 1603 until ...
).Partridge, p 612, p 621, p 884 The first lieutenant may hold the rank of sub-lieutenant, lieutenant or lieutenant-commander.


United States


U.S. Army, U.S. Marine Corps, U.S. Air Force, and U.S. Space Force

In the U.S. Army,
U.S. Marine Corps The United States Marine Corps (USMC), also referred to as the United States Marines, is the maritime land force service branch of the United States Armed Forces responsible for conducting expeditionary and amphibious operations through co ...
, U.S. Air Force, and
U.S. Space Force The United States Space Force (USSF) is the space service branch of the U.S. Armed Forces, one of the eight U.S. uniformed services, and the world's only independent space force. Along with its sister branch, the U.S. Air Force, the Space ...
, a first lieutenant is a junior commissioned officer. It is just above the rank of second lieutenant and just below the rank of captain. It is equivalent to the rank of lieutenant (junior grade) in the other uniformed services. Promotion to first lieutenant is governed by Department of Defense policies derived from the
Defense Officer Personnel Management Act The Defense Officer Personnel Management Act (DOPMA) () is a United States federal law passed in 1980 that for the first time standardized officer personnel management across the United States Armed Forces. It established ceilings on the number o ...
of 1980. DOPMA guidelines suggest all "fully qualified" officers should be promoted to first lieutenant. A second lieutenant ( grade O-1) is usually promoted to first lieutenant (grade O-2) after 18 months in the Army or 24 months in the Marine Corps and Air Force. The difference between the two ranks is slight, primarily being experience and a higher pay grade. It is not uncommon to see officers moved to positions requiring more experience after promotion to first lieutenant. For example, in the Army and Marine Corps these positions can include leading a specialty platoon, or assignment as the executive officer for a company-sized unit (70–250 soldiers or marines). In the Air Force, a first lieutenant may be a flight commander or section's officer in charge with varied supervisory responsibilities, including supervision of as many as 100+ personnel, although in a flying unit, a first lieutenant is a rated officer (pilot, navigator, or air battle manager) who has just finished training for his career field and has few supervisory responsibilities.


U.S. Navy and U.S. Coast Guard

In the U.S. Navy and U.S. Coast Guard, "first lieutenant" is the name of a billet and position title, rather than rank. Officers aboard early sailing ships were the captain and a number of lieutenants. The senior among those lieutenants was known as the first lieutenant, and would have assumed command if the captain were absent or incapacitated. As modern ships have become more complex, requiring specialized knowledge of engineering, communications, and weapons, the "first lieutenant" is the officer in command of the deck department responsible for line handling during mooring and underway replenishment. On smaller ships, the officer of the "first lieutenant" billet holds the rank of lieutenant, junior grade or ensign. On larger vessels, the position of "first lieutenant" is held by a lieutenant or, in the case of extremely large warships such as cruisers or aircraft carriers, the position of "first lieutenant" may be held by a lieutenant commander or even commander. However, on submarines and in aircraft squadrons, where the deck department may only have a few junior sailors, the "first lieutenant" billet may be filled by a first-class petty officer or chief petty officer. What is known in the U.S. Navy as the "first lieutenant division" is usually composed of junior sailors (E-3 and below) who are completing their ninety days of temporary assigned duty, or TAD, that all enlisted personnel are required to perform when initially assigned to a command. The primary mission of the division is servicing, cleaning, organizing and inventorying items within a command.Barnebey, Matthew; "1st Lieutenant Division plays significant role in supporting base", ''Jax Air News''Cutler and Cutler, p.90


U.S. Revenue Cutter Service

The term "first lieutenant" had a dual meaning in the United States Revenue Cutter Service (known until 1894 as the United States Revenue-Marine). The position title of first lieutenant was held by a junior officer who was in charge of deck operations and gunnery. The rank of first lieutenant was the equivalent of lieutenant in the current rank structure of the U.S. Coast Guard, U.S. Navy, United States Public Health Service Commissioned Corps, and National Oceanic and Atmospheric Administration Commissioned Officer Corps. The next senior officer ranking above first lieutenant was captain and the next two lower officer ranks were second and third lieutenant, respectively. When the Revenue Cutter Service merged with the United States Life-Saving Service to form the U.S. Coast Guard in 1915, the rank of first lieutenant carried over into Coast Guard and remained in use until 1918, when the Coast Guard adopted the rank structure of the U.S. Navy.Cipra, Dave; "A History of Sea Service Ranks & Titles", ''Commandant's Bulletin'', (May, June, July 1985), U.S. Coast Guard Historian's Office.


Gallery


Army

File:09.RABDF-1LT.svg, First lieutenant
(
Antigua and Barbuda Regiment The Antigua and Barbuda Regiment is the infantry unit and main fighting arm of the Antigua and Barbuda Defence Force. Previously known as the Rifle Company, it was formed in 1995 and consists of a single light infantry battalion, commanded by a Lie ...
) File:Argentina-Army-OF-1a.svg,
( Argentine Army) File:Botswana-Army-OF-1b.svg, First lieutenant
( Botswana Ground Force) File:Barzil-Army-OF-1b.svg,
( Brazilian Army) File:Cape_Verde-army-OF-1c.svg,
( Cape Verdean National Guard) File:Cuba-Army-OF-1c.svg,
( Cuban Revolutionary Army) File:Denmark-Army-OF-1b-M11.svg,
(
Royal Danish Army The Royal Danish Army ( da, Hæren, fo, Herurin, kl, Sakkutuut) is the land-based branch of the Danish Defence, together with the Danish Home Guard. For the last decade, the Royal Danish Army has undergone a massive transformation of structures ...
) File:Capona de Primer Teniente Ejercito Nacional Dominicano.svg,
( Dominican Army) Yliluutnantti M05.svg,

( Finnish Army) File:08.Gambian Army-1LT.svg, First lieutenant
(
Gambian National Army The Gambia Armed Forces, also known as the Armed Forces of The Gambia, consists of three branches: the Gambia National Army (GNA), the Gambia Navy, and the Republican National Guard (RNG). It formerly included the Gambia National Gendarmerie (GNG) ...
) File:07. Guinea-Bissau 1LT.svg,
( Army of Guinea-Bissau) File:14-TNI Army-1LT.svg,
( Indonesian Army) File:blank.svg, First lieutenant
( Liberian Ground Forces) File:Luxembourg-Army-OF-1b.svg,
( Luxembourg Army) File:Netherlands-Army-OF-1b.svg,
( Royal Netherlands Army) File:09-Nicaragua Army-1LT.svg,
( Nicaraguan Army) File:Paraguay-Army-OF-1b.svg,
( Paraguayan Army) File:PA 1st Lt.png, First lieutenant
( Philippine Army) File:US Army O2 (Army greens).svg, First lieutenant
(
United States Army The United States Army (USA) is the land service branch of the United States Armed Forces. It is one of the eight U.S. uniformed services, and is designated as the Army of the United States in the U.S. Constitution.Article II, section 2, ...
) File:blank.svg,
( National Army of Uruguay) File:PTTEEJB-GNB.png,
( Venezuelan Army)


Marines

US Marine O2 shoulderboard vertical.svg, First lieutenant
(
United States Marine Corps The United States Marine Corps (USMC), also referred to as the United States Marines, is the maritime land force service branch of the United States Armed Forces responsible for conducting expeditionary and amphibious operations through c ...
)


Navy

Generic-Navy-O2.svg,
( Cape Verdean Coast Guard)


Air Force

08.Botswana Air Force-1LT.svg, First lieutenant
( Botswana Defence Force Air Wing) File:US Air Force O2 shoulderboard.svg, First lieutenant
(
United States Air Force The United States Air Force (USAF) is the air service branch of the United States Armed Forces, and is one of the eight uniformed services of the United States. Originally created on 1 August 1907, as a part of the United States Army Si ...
)


Space Force

File:US Space-force O2 (interim).svg, First lieutenant
United States Space Force


Notes

;Citations ;References used * * * * * {{US officer ranks, collapse=collapsed Military ranks of the British Army Royal Navy appointments Military ranks of the United States Army Officer ranks of the United States Air Force Officer ranks of the United States Space Force Military ranks of the United States Marine Corps