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Video: In First, SpaceX Recovers All Reusable Rocket Components at Sea

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By The Maritime Executive 07-22-2020 03:31:43

Space flight company SpaceX has been working for years on a ship-based system to catch and recover used rocket nose fairings without letting them go into the water. On Monday, it succeeded in catching both halves of a rocket fairing, along with the booster, in a set of maneuvers off the coast of Florida. 

SpaceX has built its highly successful business by reusing rocket components wherever possible after each launch. After a SpaceX Falcon 9 booster delivers a satellite safely to orbit, it lands at a pad onshore or on a DP-equipped flat deck barge ("drone ship") at sea, depending on its trajectory. This is an industry first, and every reused booster rocket saves millions in manufacturing costs.

Each two-piece fairing costs $6 million, about 10 percent of the list price of a Falcon 9 launch, so recovering even one half could generate significant savings. However, there is a technical problem: the fairings fall back to earth over the open ocean, and if they land in the water, SpaceX will not reuse them due to concerns over corrosion. (Satellite payloads are worth hundreds of millions of dollars - far more than the rocket, let alone one fairing.)

Instead, SpaceX has chartered a handful of offshore crew boats and built the equivalent of a giant catchers' mitt on the back of each. This device has the form of a net supported by four long arms stretched far out over the side. As the fairing returns through the atmosphere, a small parachute slows its descent, and the crewboat transits to rendezvous with it. If all goes well, the fairing lands in the net. 

After a military satellite launch Monday - the 90th launch of a Falcon 9 booster - that plan succeeded fully for the first time, and both fairings fell into the net as intended. 

In an operation that has become somewhat routine, the booster also landed successfully aboard the drone ship Just Read the Instructions, the 57th time that SpaceX has landed a booster at sea. 

The launch was remarkable for other reasons. The booster delivered its payload - the South Korean military satellite Anasis II - without issue, just 51 days after its previous launch. It is the fastest turnaround time ever recorded for the second launch of a reused rocket.