A new crew arrived at the International Space Station on Friday for a six-month mission, after overcoming trouble with one of the capsule’s docking hooks.

The SpaceX capsule and its four astronauts had to wait 20 metres from the orbiting lab, as flight controllers in California scrambled to come up with a software fix.

It is the same problem that cropped up shortly after Thursday’s lift-off.

Although all 12 hooks on the capsule appeared to be fine, the switch for one of them malfunctioned. SpaceX Mission Control urged patience, telling the astronauts they could stay in this holding pattern for up to two hours.

SpaceX Crew Launch
Astronauts, from left, Warren Hoburg, Stephen Bowen, Andrei Fedyaev, and Sultan al-Neyadi head for the launch pad (AP Photo/John Raoux)

“Teams are working to get this right, not just fast,” Mission Control radioed.

Minutes later, new software commands were relayed, and the astronauts received the go-ahead to proceed with the final approach and docking.

In the end, the link-up occurred an hour late as the capsule and space station soared 260 miles above the coast of Somalia.

It was expected to take an hour before the hatches could be open, the standard time for proper pressurisation.

“Now let’s work toward getting this hatch open so you can go hug your crewmates,” Nasa Mission Control said from Houston.

The new arrivals include Sultan al-Neyadi, from the United Arab Emirates, the first astronaut from the Arab world who will spend an extended time in space.

Mr Al-Neyadi is only the second person from the UAE to rocket into orbit.

Also flying up in the capsule: Nasa’s Stephen Bowen, a retired Navy submariner who made three space shuttle flights, and Warren “Woody” Hoburg, a space newbie and former research scientist at the Massachusetts Institute of Technology, and Andrei Fedyaev, a space rookie who has retired from the Russian air force.

SpaceX launched the four astronauts for Nasa early on Thursday from the Kennedy Space Centre in Florida.

Their flight was delayed for a few days by a clogged filter in an ignition fluid line.

The UAE sent its first astronaut, Hazza al-Mansoori, to the space station in 2019 aboard a Russian rocket.

It had been decades since the first Arab launched in 1985 during Nasa’s shuttle era. The longest spaceflight by any of them was about a week.

The newcomers will replace two Nasa astronauts, a Japanese astronaut and a Russian cosmonaut who have been up there since October and will return in their own SpaceX capsule next week.