April 16 - A day after its transfer to the Launch Platform, the Zenit-3SL rocket is rolled out through the stern doors of the hangar and erected to a vertical position on the launch pad for a series of final tests. The transporter-erecter supports the rocket here for a period of 24 hours.

When testing is completed, the rocket is lowered back to a horizontal position and returned to the hangar, where preparations for transit proceed.