Small launch firm Rocket Lab USA Inc on Monday captured a falling rocket stage out of the air with a helicopter before dropping it in the ocean, appearing to achieve a partially successful test of the company’s novel cost-savings approach to recovering used rockets for multiple missions to space.

The demonstration, involving parachutes and a long cable hanging from a helicopter, sought to check off a key milestone for the Long Beach, California-based company as it ventures to slash the cost of sending things into space, an industry trend pioneered by billionaire entrepreneur Elon Musk’s SpaceX.

After lifting off to send 34 satellites toward orbit at 10:50 a.m. (2250 GMT) in New Zealand, the Long Beach, California-based company’s four-story-tall Electron booster stage fell back through Earth’s atmosphere and deployed a series of parachutes to brake its speed.

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At high altitudes above the South Pacific, just off the New Zealand coast, a helicopter hanging a long, vertical cable from its underside was steered by two pilots over the booster, which had stretched to its side a capture line as it descended under a parachute at roughly 22 miles (35 km) per hour.

The helicopter cable latched onto the booster’s capture line, as seen on the company’s live stream, prompting cheers and applause from Rocket Lab engineers in the company’s mission control center in Long Beach.

Read more: Reuters