The launch of the next Progress cargo spaceship previously scheduled for November 21st 2013 has been postponed. The new date is November 26th, Interfax reports with reference to a source close to the space industry.

"According to the new schedule the Progress M-21M spacecraft will be launched on November 26th 2013 at 00.52 (Moscow time)", - he said without specifying a reason for the delay.

According to the source, the duration of Progress M-21M’s flight to ISS will be 4 days instead of 6 hours as usual, because the repeated tests of Kurs-NA Mutual radio measuring system will be carried out during the spacecraft’s autonomous flight. We remind you that some problems emerged during first test of Kurs-NA system in July 2012".