The Dragon-4 spacecraft approaching the International Space Station pictured by ESA astronaut Alexander Gerst. The Dragon's 'fire' are propulsion jets.
Despite running the International Space Station with just three crewmembers, ESA astronaut Alexander Gerst and NASA astronaut Reid Wiseman used the Station’s 17 m-long Canadarm2 robotic arm to capture and berth the fourth Dragon supply vessel.
Setting up a temporary robotics workstation in the Station’s Cupola observatory module, the astronauts monitored the approaching six-tonne craft until it stopped 10 m from the Station. Working two joysticks, Alexander moved Canadarm2 to hold Dragon-4. From there, the spacecraft was berthed to the Space Station’s Harmony module.