page_title: SpaceX CRS-18
section_title: Primary payload
hierarchical_section_title: SpaceX CRS-18 / Primary payload
caption_attribution_description: CRS-18 Mission
context_page_description: SpaceX CRS-18, also known as SpX-18, was SpaceX's 18th flight to the International Space Station under the Commercial Resupply Services program for NASA. It was launched on 25 July 2019 aboard a Falcon 9 rocket.
  The same Dragon capsule has previously flown to the ISS in April 2015 and December 2017. This was the first time a capsule was used for a third flight.
context_section_description: In February 2016, it was announced that NASA had awarded a contract extension to SpaceX for five CRS additional missions (CRS-16 to CRS-20).
  NASA has contracted for the CRS-18 mission from SpaceX and therefore determines the primary payload, date/time of launch, and orbital parameters for the Dragon space capsule. It carried the third International Docking Adapter (IDA-3).
  The following is a breakdown of cargo bound for the ISS:
  Science investigations: 1,192 kg (2,628 lb)
  Crew supplies: 233 kg (514 lb)
  Vehicle hardware: 157 kg (346 lb)
  Spacewalk equipment: 157 kg (346 lb)
  Computer resources: 17 kg (37 lb)
  External payloads: IDA-3 534 kg (1,177 lb)
  The Dragon spacecraft also featured a handful of ceramic heat shield tiles, meant to flight-test a critical component of the SpaceX Starship spacecraft.
caption: CRS-18 launch
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