Korvettenleutnant

Korvettenleutnant was an officer rank in the Austro-Hungarian Navy. It was equivalent to Leutnant of the Austro-Hungarian Army, as well to Leutnant zur See of the Imperial German Navy. Pertaining to the modern day's NATO rank code it could be comparable to OF-1b.
The rank of Korvettenleutnant was limited to naval reserve officers. Professional officers skipped that rank and were promoted from Seefähnrich to Fregattenleutnant, the next higher rank. A Korvettenleutnant wore the same rank insignia as a Seefähnrich.
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, frigate, and to ship of the line. In the Austro-Hungarian Navy the appropriate rank designations were derived as follows.

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 modern Croatian naval forces.

junior rank Seekadett	(k.u.k. Kriegsmarine rank) Seefähnrich	senior rank Fregattenleutnant
junior rank Seekadett	Korvettenleutnant	senior rank Fregattenleutnant

Other countries

The rank designation Korvettenleutnent was used continuously in naval forces of former Yugoslavia and as junior officer rank in modern today's naval forces of Croatia, Slovenia and Serbia.