Lieutenant (navy)

Common military ranks in English
Navies	Armies	Air forces
Commissioned and Non-commissioned officers
Admiral of the fleet	Marshal or Field marshal	Marshal of the air force
Admiral	General	Air chief marshal
Vice admiral	Lieutenant general	Air marshal
Rear admiral	Major general	Air vice-marshal
Commodore	Brigadier or Brigadier general	Air commodore
Captain	Colonel	Group captain
Commander	Lieutenant colonel	Wing commander
Lieutenant commander	Major or Commandant	Squadron leader
Lieutenant	Captain	Flight lieutenant
Sub-lieutenant	Lieutenant or First lieutenant	Flying officer
Ensign	Second lieutenant	Pilot officer
Midshipman	Officer cadet	Flight cadet
Enlisted grades
Warrant officer or Chief petty officer	Warrant officer or Sergeant major	Warrant officer
Petty officer	Sergeant	Sergeant
Leading seaman	Corporal	Corporal
Seaman	Private	Aircraftman

Lieutenant (abbreviated Lt, LT, LT(N), Lt(N), Lieut and LEUT, depending on nation) is a commissioned officer rank in many nations' navies. It is typically the most senior of junior officer ranks. The rank's insignia usually consists of two medium gold braid stripes and often the uppermost stripe features a loop or executive curl.

The now immediately senior rank of lieutenant commander was formerly a senior naval lieutenant rank. Many navies also use a subordinate rank of sub-lieutenant. The appointment of "first lieutenant" in many navies is held by a senior lieutenant.

Naval lieutenants rank higher than army lieutenants; a naval lieutenant is a NATO OF-2 (US grade O-3) and ranks with an army captain.

From at least 1580, the lieutenant on a ship had been the officer immediately subordinate to the captain. Before the English Restoration, lieutenants were appointed by their captains, and this inevitably led to abuses and to the widespread appointment of men of insufficient qualification. In 1677, Samuel Pepys introduced the first examination for lieutenant, and it is from the date of this examination that their seniority was set.

Lieutenants were numbered by their seniority within the ship, so that a frigate (which was entitled to three) would have a first lieutenant, a second lieutenant, and a third lieutenant. A first-rate ship was entitled to six, and they were numbered accordingly. At first, a lieutenant's commission was given only for the ship in which he served, but with policy changes after the loss of HMS Wager in 1741 and the subsequent mutiny, lieutenants were given full commissions upon passing their examination.

During the early days of the naval rank, some lieutenants could be very junior indeed, while others could be on the cusp of promotion to captain; those lieutenants ranged across modern army ranks from second lieutenant through lieutenant colonel. As the rank structure of navies stabilised, and the ranks of commander, lieutenant commander and sub-lieutenant were introduced, the naval lieutenant today ranks with an army captain (NATO OF-2 or US O-3).

...
Wikipedia