HSwMS Trossö (A264) is an auxiliary ship in the Swedish Navy. She was built in Finland for the Soviet Navy as an Akademik Shuleykin-class ice-strengthened patrol craft tender, launched in 1984 as Arnold Veymer and renamed Livonia in 1991. Her sister ships were Akademik Shuleykin, Akademik Gamburtsev, Professor Molchanov, Professor Multanovskiy, Geolog Dmitriy Nalivkin, Professor Polshkov, Professor Khromov and Akademik Shokalskiy.
Varv: Valmet Oy, Helsingfors, Finland. Inköpt: 1996