The Universal Docking Module (UDM) (), was a planned Russian docking module for the

International Space Station The International Space Station (ISS) is a large space station that was Assembly of the International Space Station, assembled and is maintained in low Earth orbit by a collaboration of five space agencies and their contractors: NASA (United ...

, to be jointly built by RKK Energia and Khrunichev. The ''Prichal'' nodal addition to the ''Nauka'' laboratory, the eventual form of the FGB-2 design upon which the UDM was based, grew out of this proposal.

History

The original design resembled ''Zarya'' but was larger. It would be docked to the

nadir The nadir is the direction pointing directly ''below'' a particular location; that is, it is one of two vertical directions at a specified location, orthogonal to a horizontal flat surface. The direction opposite of the nadir is the zenith. Et ...

(Earth-facing) '' Zvezda'' service module docking port, and have four docking ports to accommodate the two Russian Research Modules and the SO2 docking compartment, later named '' Poisk''. Because one Russian Research Module was cancelled due to lack of funds, this module was also cancelled. The one remaining Research Module was then scheduled to be fitted to the open docking port on ''Zvezda''. Later it was also cancelled and that port was allocated to the Docking and Cargo Module, later named ''Rassvet''. ''Rassvets scheduled location was later moved to ''Zarya'', while ''Poisk'' was moved to the zenith docking port on ''Zvezda''.

History

References

See also