An unmanned Russian cargo ship arrived at the International Space Station Wednesday, less than six hours after it launched into orbit. The successful maneuver marked the first time a same-day docking has ever been accomplished at the massive orbiting outpost.

The robotic Progress 48 cargo freighter automatically parked to the Pirs docking compartment on the Russian segment of the complex slightly ahead of schedule, at 9:19 p.m. EDT (0119 GMT Aug. 2), as both spacecraft flew over the Pacific Ocean. In addition to delivering fresh supplies to the space station, the spacecraft also tested the novel same-day rendezvous and docking procedure.

According to NASA officials, the docking test proceeded smoothly and the Progress vehicle's systems responded flawlessly throughout the shortened flight to the space station.

The Progress 48 launched into orbit atop a Soyuz rocket earlier today, at 3:35 p.m. EDT (1935 GMT), from the Baikonur Cosmodrome in central Asia. Roughly six hours later, the spacecraft arrived at the orbiting outpost.

- space station flight director Chris Edelen

Russia is aiming to eventually implement this same-day docking plan for future manned flights of Soyuz space capsules to the International Space Station.

"They're looking to eventually take this into the Soyuz phase," Dan Harman, NASA's space station manager of operations and integration, said in a news briefing last week. "If you can get the crew to orbit in six hours and onboard the International Space Station, that could be a tremendous benefit over the two-plus days it takes today." [Photos: Russia's 1st Same-Day Cargo Ship Flight to Space Station]

Shortening the orbital chase

Progress and Soyuz vehicles typically spend two days chasing the space station in orbit after launch. A quicker arrival to the orbiting complex could cut down the overall amount of consumables such as food, water and fuel needed for the onboard crew.

Docking to the station within hours of launch also minimizes the amount of time the astronauts spend inside the small Soyuz capsule, which could improve the comfort of the spaceflyers, said space station flight director Chris Edelen.

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Cargo spaceship makes superspeed trip to space station