Linienschiffsleutnant

Linienschiffsleutnant (Hun: Fregatthadnagy / en: translation Ship-of-the-line lieutenant) was an officer rank in the Austro-Hungarian Navy. It was equivalent to Hauptmann of the Austro-Hungarian Army, as well to Kapitänleutnant of the Imperial German Navy. Pertaining to the modern day's NATO rank code it could be comparable to OF-2.

The rank designation was used continuously in the Austria-Hungarian follow on countries Yugoslavia, Croatia, and Slovenia, as well as in the modern day´s Austrian merchant navy.

The rank name was selected in line to the division of war ships to specific ship categories early of the 19th century, e.g. corvette (de: Korvette), frigate (de: Fregatte), and to ship of the line (de: Linienschiff). In the Austro-Hungarian Navy the appropriate rank designations were derived as follows.
 * Korvettenkapitän OF-3 (equivalent: to Heer Major)
 * Fregattenkapitän OF-4 (equivalent: to Heer Oberstleutnant)
 * Linienschiffskapitän OF5; (equivalent: to deutsche Marine Kapitän zur See / Heer Oberst)

According to that systematic the rank designations to subaltern – or junior officers were derived as follows: This sequence of ranks can be found in the today´s naval forces of Croatia, and Slovenia.
 * Korvettenleutnant OF-1b (equivalent to deutsche Marine Leutnant zur See Heer: Leutnant)
 * Fregattenleutnant OF-1a (equivalent to deutsche Marine Oberleutnant zur See / Heer: Oberleutnant)
 * Linienschiffsleutnant OF-2 (equivalent to deutsche Marine Kapitänleutnant / Heer:Hauptmann)

Other countries
The rank designation Linienschiffsleutant was used continuously in naval forces of former Yugoslavia and as (OF-2) rank in modern today’s naval forces of Croatia, and Slovenia.