Activities at the Home Port:

• Rocket Segment systems and equipment processing for activities at the Home Port and in the launch area;
• Block DM-SL ¹20L processing, testing and fueling;
• Zenit-2S LV ¹SL19 processing and testing;
• Block DM-SL ¹14L (donor US) processing and testing;
• Zenit-2S LV ¹SL15 (donor LV) processing and testing;
• Assembly and testing of ILV as a part of Zenit-2S LV ¹SL19, Block DM-SL ¹20L and PLU with the Inmarsat-4 SC;
• Block DM-SL ¹14L is transferred to the storage mode on ACS;
• Check of the Rocket Segment with ILV “dry roll-out”.

ACS and LP passage to the launch area. Activities in the sea passage phase:

• system and assembly parameter monitoring on LP and ACS;
• ntegrated demonstration tests on ACS with involvement of all the Sea Launch Segments and structures.

ACS and LP arrival in the launch area.

Activities in the launch area:

• equipment prelaunch maintenance;
• Rocket Segment systems bringing to readiness for activities in the launch area;
• ILV processing;
• processing of the Upper Stage (as a part of ILV);
• ILV roll-out and its installation on the launch pad;
• ILV electrical checks and provision of critical launch readiness checklist, results analysis.

• ILV prelaunch processing and launch;
• communication sessions with US;
• systems and assemblies bringing to the initial state.

At 17h 07 min, Moscow time (06h 07 min, Pacific standard time) a launch was performed from the Odissey launch platform. The Inmarsat-4 spacecraft was injected into the calculated orbit.