boatswain's mate)[1] was, in the Austro-Hungarian Navy (1786-1918), an enlisted rank and, in the Imperial German Navy, a non-commissioned officer (NCO) rank.

Austro-Hungarian Navy (1786 until 1918) equivalent to the rank Corporal of the k.u.k.

The sequence of ranks was as follows: The Bootsmannsmaat was equivalent to the rank of Unteroffizier in Heer und Luftwaffe.

Regarding the particular career or assignment the sequence of ranks (both of them OR5 / second mates) and the grade description was established as follows: Similar to the naming in German speaking naval forces, in the Imperial Russian Navy (IRN) of the Russian Empire there was the rank Bootsmannsmaat (original Russian: боцманмат / botsmanmat) as well.

However, it was an OR6-rank equivalent to the Senior unteroffizier (ru: «старший унтерофицер» (ОR6)).