The SpaceX Falcon 9 rocket, which launched from Vandenberg Air Force Base carrying 64 "smallsats", set a record for most satellites strapped to a rocket booster, a stack more than 20 feet tall.
SpaceX followed the Spaceflight mission with a December 5 resupply to the International Space Station, which marked the company's 20th launch in 2018.
The Falcon 9 rocket lifted off successfully at 1:16 pm Eastern Standard Time from Florida's Cape Canaveral Air Force Station, carrying 2,500 kilos of supplies, including science experiments and food for six astronauts now on board the ISS.
There was a problem with the grid fin hydraulic pump, he explained, so the rocket landed in the sea. Hans claimed that the water landing was pretty much smooth and today's incident showed how SpaceX's rocket are created to save itself in case if anything goes wrong.
The first stage rocket had separated normally several minutes after the lift-off, but as it approached the landing site, it started spinning rapidly.
"Engines stabilized rocket spin just in time, enabling an intact landing in water!" It appeared to be undamaged and was transmitting data, Musk said, adding that a recovery ship was sent to retrieve it.
This is the first time that SpaceX has failed to land the booster on the ground.
The Dragon space capsule that flew on Wednesday was used once before, on a supply mission in February 2017. The rocket was loaded with supplies, science experiments and food for the astronauts living there.