Lieutenant commander

Lieutenant commander
Lieutenant commander
Lieutenant commander
{{lang|lt|Komandoras leitenantas}}
{{lang|pl|Komandor porucznik}}
{{lang|ro|Locotenent-comandor}}
Lieutenant commander

Commissioned officer rank in many navies.

- Lieutenant commander
Lieutenant commander

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Epaulette of a commander in the Metropolitan Police

Commander

Common naval officer rank.

Common naval officer rank.

Epaulette of a commander in the Metropolitan Police
Epaulette of a commander in the City of London Police
Commander
Commander
{{lang|sv|Kommendör}}
{{lang|fi|Komentaja}}
Commander
{{lang|lt|Komandoras}}
{{lang|nl|Commandeur}}
{{lang|pl|Komandor}}
{{lang|ro|Comandor}}
Commander

A commander in the Royal Navy is above the rank of lieutenant commander, below the rank of captain, and is equivalent in rank to a lieutenant colonel in the army.

A commissioned officer (left) and a non-commissioned officer of the British Army prepare for a mission in Afghanistan.

Lieutenant (navy)

Commissioned officer rank in many nations' navies and coast guards.

Commissioned officer rank in many nations' navies and coast guards.

A commissioned officer (left) and a non-commissioned officer of the British Army prepare for a mission in Afghanistan.

The now immediately senior rank of lieutenant commander was formerly a senior naval lieutenant rank.

A commissioned officer (left) and a non-commissioned officer of the British Army prepare for a mission in Afghanistan.

Junior officer

Junior officer, company officer or company grade officer refers to the lowest operational commissioned officer category of ranks in a military or paramilitary organization, ranking above non-commissioned officers and below senior officers.

Junior officer, company officer or company grade officer refers to the lowest operational commissioned officer category of ranks in a military or paramilitary organization, ranking above non-commissioned officers and below senior officers.

A commissioned officer (left) and a non-commissioned officer of the British Army prepare for a mission in Afghanistan.

In the United States Armed Forces, the term junior officer is used by the Navy, Coast Guard, Public Health Service, and NOAA Corps for officers in the ranks of chief warrant officer (W-2 to W-4), ensign (O-1), lieutenant (junior grade) (O-2), lieutenant (O-3), and lieutenant commander (O-4).

U.S. Naval Civil Engineer Corps Insignia

Civil Engineer Corps

Staff corps of the United States Navy.

Staff corps of the United States Navy.

U.S. Naval Civil Engineer Corps Insignia
WWII Naval Officers from the Civil Engineer Corps, Medical Corps, Dental Corps and Supply Corps assigned to Naval Construction Battalions had a Silver Seabee on their Corps insignia.
Capt. John N. Laycock (CEC) discussing his modular pontoon box system with Admiral Moreell.
Lt Cmdr. Edward Swain Hope CEC was the most senior African American officer in the United States Navy during WWII.
Capt. Brockenbrough (CEC) CB 71, Third Marine Division Shore Party Commander on Bougainville.
LVT-2 doodlebug going through tests on Saipan. It was a CEC assault concept vehicle.
"NCDU 45", Ensign Karnowski CEC Chief Carpenters Mate Conrad C. Millis, MM2 Equipment Operator Lester Meyers and three sailors. The unit received a Presidential Unit Citation (United States) with Ens. Karnowski earning the Navy Cross & French Croix de Guerre with Palm, while MM2 Meyers received a Silver Star.
U.S. Naval insignia, brass subdued per USMC regulation for CEC in CBs transferred to the Corps.
ChCarp. W. H. Achenson (CEC) awarded Silver Star for UDT 1 actions
Lt. Crist (CEC), Lt. Cmdr. Kaufmann and Lt. Carberry right to left at awards ceremony

The discretionary authority given to the President by the Statute of 3 March 1871, to determine and fix the relative rank of civil engineers was not exercised until the 24th of February 1881, when relative rank was conferred upon them and fixed as follows: One with the relative rank of captain (CAPT), two with that of commander (CDR), three with that of lieutenant-commander (LCDR), and four with that of lieutenant (LT).

A poster showing the rank insignia of the officers of several armed forces at the time of the Second World War.

Military rank

Armed forces, police, intelligence agencies or other institutions organized along military lines.

Armed forces, police, intelligence agencies or other institutions organized along military lines.

A poster showing the rank insignia of the officers of several armed forces at the time of the Second World War.

In others lieutenant-commanders, as equivalents to army and marine majors, are considered senior officers.

USS Argonaut as she originally appeared, seen at the Panama Canal Zone during training in May 1945.

USS Argonaut (SS-475)

Operated by the United States Navy (USN).

Operated by the United States Navy (USN).

USS Argonaut as she originally appeared, seen at the Panama Canal Zone during training in May 1945.

Her commanding officer from 1960 to 1962 was Lieutenant-Commander (LCDR) Earl Resch.

Rockall

Uninhabitable granite islet situated in the North Atlantic Ocean.

Uninhabitable granite islet situated in the North Atlantic Ocean.

The Rockall Trough separating Ireland and Scotland from the Rockall Plateau on which Rockall is situated
Unusually large winter waves breaking over the islet, 11 March 1943
Seabed oil survey
An illustration depicting HMS Endymion's landing party in their boat at Rockall, with Endymion in the background
Lieutenant Commander Desmond Scott hoists the Union Flag in 1955.
The Irish Naval Service vessel Róisín at Rockall conducting routine maritime security patrols 230 nmi off the north-west coast of Ireland
Exclusive economic zones of the UK, Ireland, Faroe Islands (Denmark), and Iceland around Rockall
ROCKALL – Nautical chart – Atlantic Sea Pilot, 1884

On 18 September 1955, Rockall was annexed by the British Crown when Lieutenant-Commander Desmond Scott RN, Sergeant Brian Peel RM, Corporal AA Fraser RM, and James Fisher (a civilian naturalist and former Royal Marine), were winched onto the island by a Royal Navy helicopter from (coincidentally named after the man who first charted the island).

Members of the Royal Naval Reserve training at Tramore, County Waterford, c. 1905

Royal Naval Reserve

One of the two volunteer reserve forces of the Royal Navy in the United Kingdom.

One of the two volunteer reserve forces of the Royal Navy in the United Kingdom.

Members of the Royal Naval Reserve training at Tramore, County Waterford, c. 1905
A First World War RNR Lieutenant wearing the "wavy navy" rank insignia of reserve officers
Lieutenants of the RNR (left) and RNVR (right) during the Second World War—note the difference in insignia styles.
The officers of HMS Forward on parade in Birmingham on 11 November 2010
Destroyer officers in 1943 showing differences in regular and reserve rank insignia as used 1916–1952: From left, sub-lieutenant RNR, lieutenant RN and lieutenant RNVR.
RNR rank badges 1916–1951.
RNVR rank badges 1916–1958.
Royal Naval Reserve (RNR) nurses at work in the operating theatre
Lieutenant D. M. N. Davidson (right) of the RNVR enjoying beer with members of Z Special Unit in Brisbane after the completion of Operation Jaywick
Blue Ensign of the United Kingdom
The crew of HMS Castle Harbour, assigned to the of the Royal Naval Dockyard in the Imperial fortress colony of Bermuda as the Examination Service vessel (that inspected merchant ships at Five Fathom Hole, under the guns of St. David's Battery - designated the Examination Battery, prior to their entering the shipping channel through Bermuda's reef). Crew members shown included a Royal Naval Volunteer Reserve officer at left, a Royal Navy officer, regular and temporary ratings, Merchant Navy and Pilot Service personnel, and even one older Sea Scout.

Nicholas Monsarrat, frigate commander during World War II, author of The Cruel Sea, reached the rank of lieutenant commander

Worf aboard the USS Enterprise-D during season 7, which is set in 2370

Worf

Fictional character in the Star Trek franchise.

Fictional character in the Star Trek franchise.

Worf aboard the USS Enterprise-D during season 7, which is set in 2370
Actor Michael Dorn portrayed Worf.
Worf fights a Jem'Hadar soldier with an energy weapon in Star Trek: Deep Space Nine: The Fallen.

In 2371, he was promoted lieutenant commander (Star Trek Generations).

Tom Paris

Fictional character in the American science fiction television series Star Trek: Voyager and is portrayed by Robert Duncan McNeill.

Fictional character in the American science fiction television series Star Trek: Voyager and is portrayed by Robert Duncan McNeill.

In the non-canonical Voyager relaunch novels, written by Christie Golden, Paris was promoted two steps in rank, like many of the Voyager crew, and is now a lieutenant commander.