Its original name was Docking Module 2 (Stykovochniy Otsek 2 (SO-2)), as it is almost identical to the Pirs Docking Compartment.
Nama aslinya adalah Docking Modul 2 (Stykovochniy Otsek 2 (SO-2)), karena hampir identik dengan Pirs Docking Kompartemen.