Denmark, Norway and Finland

The same rank is used in the navies of Denmark (kaptajnløjtnant), Norway (kapteinløytnant) and Finland (Finnish: kapteeniluutnantti; Swedish: Kaptenlöjtnant).

In Denmark and Norway, the higher rank is Ship-of-the-line captain (Danish: Orlogskaptajn; Norwegian: Orlogskaptein), and the lower rank is First lieutenant (Premierløjtnant) in Denmark and Lieutenant (Løytnant) in Norway.^[1][2]

Estonia

In the Estonian Navy the similarly sounding rank of kaptenleitnant is an officer rank classified as NATO OF-4, i.e. equal to commander in the Royal Navy and United States Navy.^[3]

Sweden

A captain lieutenant (Kaptenlöjtnant) was in Sweden an officer standing between captain and lieutenant, who commanded one of the companies, which actually had the regimental commander, lieutenant colonel or major as officer commanding. In 1750, the rank title of captain lieutenant was replaced by that of staff captain, whose number, when the rand of second major was established in 1757, became four in each infantry regiment. The rank was abolished in 1833.^[4]

Russia

Kapitan-leytenant (Russian: капитан-лейтенант) is a rank in the Russian Navy, previously the Red Fleet/Soviet Navy and Imperial Russian Navy. It is the rank below a captain of the 3rd rank and above a senior lieutenant. In Soviet times, it may be achieved as early as an officer's 5th year of service. In Russian and other East-European navies it is the most senior junior officer rank (equivalent to "captain" in the Army/Ground Forces).

The Russian Navy assigns this rank the two-and-a-half stripe insignia used in Britain and the US for lieutenant commanders. On the other hand, the US Navy considers this rank equivalent to lieutenant.

In terms of responsibilities, officers of this rank may serve as department heads on larger warships, but may also serve as commanding officers of 3rd and 4th rank warships (Russian ship classifications referring to all from Krivak-class frigates to gunboats and minesweepers).

Unlike the equivalent OF2-rank Kapitänleutnant in the German Navy, submarines are at least nominally not on the list of eligible positions. In the past, when the boats were smaller, captain-lieutenants were eligible for the submarine command. However, in current Russian ship ranking no modern submarine is given 3rd rank. This reflects the high status of submarines, as all nuclear submarines (SSBN or SSN) are considered 1st rank and large and medium diesels 2nd rank, while smaller 3rd rank submarines simply aren't built.^[5]

Rank insignia IRA, Soviet Navy, RF Navy

	Kapitan-leytenant
	shoulder board (1703−1911)	shoulder board (1943−1955)	shoulder board (1955−1991)	... everyday uniform	shoulder board / sleeve insignia (after 2010)

Ukrainian Navy

Captain-lieutenant (Ukrainian: капітан-лейтенант) is a rank in the Ukrainian Navy. These are equivalent to lieutenant (OF-2).

The armed forces of Ukraine, formed during the collapse of the USSR, adopted the Soviet model of military ranks, as well as the Soviet marks of distinction. For the distinguishing marks, the captain-lieutenant had three tapes (two medium tapes, one above narrow one) on the sleeve, and chains of one lumen on which four small five-pointed stars were placed.

On July 5, 2016, the President of Ukraine approves the "Uniform Design and Signs of the Distinction of the Armed Forces of Ukraine". The draft includes, among other things, military ranks and distinguishing marks for military personnel. The marks of the distinction of servicemen are changing, departing from the Soviet standard.

November 20, 2017 issued by the order of the Ministry of Defense of Ukraine No. 606, which specifies the rules for wearing and using uniform insignia by military personnel.^[6][7] The distinguishing marks of the captain-lieutenant became three stripes (two middle ones, one narrow one among which). The distinguishing marks are placed on both the sleeves and on the coats.

Rank insignia UA Navy

	Captain-Lieutenant
	shoulder board (1995−2016)	shoulder board / sleeve insignia (after 2016)