The
Functional Cargo Block or
FGB (from the Russian , ,
GRAU index 11F77) was part of the
Soviet TKS spacecraft. The TKS spacecraft was intended to be used as a resupply craft for
Almaz space stations and saw some test flights in the
Salyut space station program. The TKS spacecraft was formed by mating a FGB with a
VA spacecraft, with both the VA and the FGB being capable of independent operation.