She had been assigned to serve as an anti-submarine patrol ship after giving support to the landing and occupation of the city when Lieutenant Ludovico De Filippi, captain of Cesare Rossarol, received orders to escort a Serbian officer to Fiume whose orders were to convince the Serb-Croatian irregular troops not to oppose to the Italian occupation of the city.
Dodijeljena mu je zadaća da služi kao protupodmornički izviđački brod nakon što je pružio potporu u iskrcavanju i okupaciji grada kada je poručnik Ludovico De Filippi, kapetan Cesara Rossarola, dobio zapovijed da isprati srpskoga časnika do Rijeke čije su zapovijedi bile uvjeriti srpsko-hrvatske neredovite trupe da se ne odupiru talijanskoj okupaciji grada.