Chemical tanker mothership that engaged in suspected chain of ship-to-ship transfers of refined petroleum involving the vessels "Joffa" (IMO: 8513405) and "Unica" (IMO: 8514306) and conducted several ship-to-ship transfers with the vessel "Rocky" (IMO unknown) between December 2021 and February 2022 while showing multiple unaccounted periods of lacking AIS transmissions.