Launch from the Baikonur Cosmodrome; landing
185 km northwest of Tselinograd.
The spacecraft approached the station
the next day, and it contacted the forward port, but Soyuz 25 failed to make
a hard dock
with the station. The cosmonauts told the ground crew that they
had attempted to dock four times, but that the contact light failed to come on.
While the crew waited in soft dock - the docking system probe was latched onto
the Salyut docking drogue, but the probe had failed to retract and bring the
craft together - the ground crew studied the problem. On the 20th orbit,
undocked the Soyuz, and attempted to dock for the
fifth time during the 23rd orbit, but failed again. The decision was made to
return to Earth, as the Soyuz was equipped with batteries designed to last
about two days, and the craft lacked fuel to attempt to dock with the port on
the opposite side of the station.
Another problem of this mission was,
that only rookies flew
. The rules were changed, so that a rookie only
could fly together with a veteran cosmonaut. Until the mission of
this rules were not
The premature return to Earth was without additional more