China Nets Its Rocket: Sea-Platform Catch Offers a New Model for Booster Recovery

China just pulled off a first of a different kind. The Long March-10B carrier rocket achieved a fully controlled recovery, staging the world's first net-based capture of a launch vehicle over the South China Sea. A historic breakthrough for reusable rocket technology, and it pushes China firmly into the era of rocket recovery. The payoff is clear: lower commercial launch costs and a stronger competitive position for China's commercial space sector on the world stage.

The tension was real. About eight minutes after liftoff, the first stage was precisely captured by an offshore recovery platform. Engineers who developed the Long March-10B reportedly fought back tears when they saw real-time footage of the stage landing steadily. China has now become the second country in the world to master vertical rocket recovery technology. One expert called it "a precise two-way rendezvous between the rocket and the offshore platform," highlighting the tight coordination that made the capture possible.

China pioneers net-based rocket recovery, marking a historic breakthrough in reusable launch technology.

The mission itself ran like clockwork. At 12:15 pm on July 10, the Long March-10B lifted off from the Hainan Commercial Space Launch Site and delivered its payload into the designated orbit. Six minutes after stage separation, the first stage began its vertical return. It was recovered via a net-capture system on an offshore platform located more than 300 km from the launch site, and the recovery mission was a complete success.

The Long March-10B rocket has a 5-meter diameter and a two-stage configuration, with a liquid oxygen-kerosene first stage and a liquid oxygen-methane second stage. It generates about 890 tonnes of thrust and can carry 16 tonnes to low Earth orbit in reusable mode.

According to Global Times, the China Academy of Launch Vehicle Technology (CALT), under the China Aerospace Science and Technology Corporation (CASC), developed the Long March-10B. The rocket has a diameter of 5 meters and adopts a two-stage configuration. Its core first stage inherits the configuration of the Long March-10A first stage and uses liquid oxygen-kerosene propellant, while the second stage uses liquid oxygen-methane propellant.

The rocket generates about 890 tonnes of thrust at liftoff, with a launch mass of approximately 760 tonnes and a total length of about 63 meters. In reusable mode, it can deliver up to 16 tonnes to low Earth orbit.

Size matters here. Rocket technology expert Kan Lei from the Rocket Academy noted that a 5-meter diameter is currently the mainstream design for heavy-lift launch vehicles, since it allows for larger engines and more propellant to support higher payload capacity. The Long March-10B can meet a wide range of mission needs, including low-Earth-orbit satellite internet constellation deployment and large commercial satellite launches. Its reusability significantly lowers costs while offering high payload capacity and strong cost-performance advantages.

Experts say the return process includes four stages: coast and attitude adjustment, powered deceleration, aerodynamic deceleration, and landing.

During its maiden flight, the Long March-10B ascended for about 3,000 seconds after ignition. Kan Lei explained that during ascent, the first stage's seven liquid oxygen-kerosene engines powered the acceleration. After stage separation, the second stage's single liquid oxygen-methane engine took over. It completed orbit insertion through a sequence of powered flight, coast, attitude adjustment, and re-ignition, while also performing passivation procedures.

The return and landing phase was the core technical validation of this mission. After separating at around 150 seconds into flight, the first stage began descending from above 100 km altitude. It entered the return phase at several times the speed of sound.

Rocket designer Wang Cong broke the return process into four distinct stages: coast and attitude adjustment, powered deceleration, aerodynamic deceleration, and landing. In the first phase, grid fins deploy to adjust re-entry attitude, while the propellant settling system positions fuel for engine restart. In the powered deceleration phase, engines reignite to cut speed before the stage enters denser atmosphere, preventing structural damage from extreme thermal loads.

This is followed by aerodynamic deceleration, where grid fins provide drag while the rocket endures intense heating and aerodynamic stress. Finally, during landing, engineers use a "near-hover" control strategy. It combines grid fins and engine thrust with online trajectory planning to bring altitude and velocity down to near zero, enabling precise capture by the offshore net-capture system.

Most reusable rockets worldwide rely on landing legs. The Long March-10B team took a different path entirely, innovatively adopting a net-based offshore capture system. It offers what experts describe as a "Chinese solution" for large-scale rocket recovery, showcasing a distinct engineering approach.

Technical expert Chen Muye explained that net-based recovery is more forgiving on landing requirements. It eliminates the need for complex landing legs, which reduces structural weight and increases payload capacity. It also allows greater tolerance in landing accuracy by expanding the capture window, and the design can scale to accommodate rockets of different sizes.

The offshore recovery vessel "Navigator" was already in position as the Long March-10B first stage descended over the South China Sea. The platform measures 144 meters long and 50 meters wide, with a draft of 5.5 meters and a full-load displacement of 25,000 tonnes. Featuring a Class 2 Dynamic Positioning (DP2) system, it can counter wind, waves, and currents to hold a precise location and heading, effectively serving as a stable mobile landing site.

The offshore recovery platform "Navigator" is 144 meters long and 50 meters wide, with a draft of 5.5 meters and a displacement of 25,000 tonnes.

As the first stage approached, it decelerated and interfaced with cables driven by pulley systems. The rocket's onboard navigation and positioning systems continuously relayed velocity and position data so controllers could adjust attitude and speed. Meanwhile, the platform's net-capture system monitored the rocket in real time and controlled cable movement through ground systems.

Expert Sun Zhenlian used the same phrase again: "a precise two-way rendezvous between the rocket and the offshore platform." It captures the synchronized coordination that defined the entire operation.

Once inside the net system, the rocket's hooking mechanism deployed and engaged with four well-shaped cables. The rocket descended slowly and was captured precisely. Sun described the hooking system as enduring complex loads during contact, sliding, and tensioning, calling it "like a pair of strong hands firmly gripping the rocket." The net system then delivered buffered deceleration.

Securing the rocket took two more steps. First, auxiliary cables stabilized it from multiple directions. Then an automatic locking platform moved beneath the rocket to clamp and support it, which Sun compared to "fastening a seatbelt," ensuring stability despite wind and waves.

The development team is not slowing down. They plan to keep optimizing performance and advancing reusable technology, with a reused first-stage flight targeted before the end of the year. Kan Lei noted that the maturity of reusable rocket technology directly determines access-to-space capability and cost efficiency. With multiple large satellite internet constellations entering deployment, demand for launches is surging, marked by tight schedules and high frequency that expose the cost and capacity limitations of expendable rockets.

After the successful launch and recovery, aerospace personnel celebrated enthusiastically. 長十乙成功發射並回收後，一眾航天人員都歡呼雀躍。

He added that the successful maiden flight and recovery of the Long March-10B fills a gap in China's low-cost, heavy-lift reusable rocket capability. This will significantly boost competitiveness in the global commercial launch market. Going forward, the rocket will support large-scale constellation deployments in low and medium Earth orbits.

Looking ahead, recovered first stages from the Long March-10A may also be reused for launches. That would contribute flight data for its crewed missions and improve reliability. The Long March-10A, a next-generation crewed launch vehicle, is expected to serve as the "lifeline ladder" for astronauts traveling between Earth and space stations, representing an upgraded integration of the Long March-2F and Long March-7.

China is not stopping at the Long March-10B either. Based on its 5-meter design, engineers are developing a larger liquid oxygen-methane first stage, which will pair with the existing second-stage module to create the Long March-10C, a fully liquid oxygen-methane rocket aimed at commercial missions. Wang Cong said the project is being developed intensively and will further advance the industrialization of China's space transportation sector.

Mao Paishou

** 博客文章文責自負,不代表本公司立場 **

The Strait of Hormuz is on fire again, literally. The United States has struck Iran once more, hitting back after attacks on commercial vessels moving through the strait, and it has yanked Iran's oil export permits in the process. Oil prices have spiked in response, and the shipping lanes through Hormuz keep getting choked off as the standoff between Washington and Tehran drags on.

An oil tanker in the Strait of Hormuz was struck by a projectile and caught fire.

Beijing has rolled out three moves to take the edge off surging oil prices: tighter energy management, its strategic reserves, and a longer-term shift in its energy mix. Some foreign outlets say this is the second time that China rescues the world economy, with reference to China’s expansion of domestic demand and support for the world economy during the 2008 financial crisis.

The Wall Street Journal's analysis, cited by China News Service, makes the mechanism clear. China's pullback in crude imports has freed up supply for everyone else on the international market. Bertille Bayart, senior economics editor at France's Le Figaro, put it bluntly in a commentary last month: China is once again stabilizing the global economy through its own policy choices, just as it did after 2008.

Foreign media say China is once again rescuing the global economy, just as it did after the 2008 financial crisis.

Rewind to 2008 to see the first act. Markets collapsed, demand dried up, and growth stalled across the globe. China stepped in with a package of counter-cyclical policies that expanded domestic demand and helped pull the world economy out of its slump.

Now the crisis has emerged in the Middle East. The Hormuz Strait carries around 20 million barrels of crude and petroleum products every day, roughly a fifth of global oil transport. Any blockage there sends oil prices soaring, stokes inflation, and throws the world economy into disarray. In some countries, even plastic bags have gotten scarcer and pricier.

Faced with rising energy costs, most countries have scrambled to protect themselves. That has meant hoarding energy resources and throwing up trade barriers, moves that only deepen the global economic pain. China has chosen a markedly different path.

China's crude imports fell 29% year-on-year in May. That single move freed up a large chunk of supply for other countries on the international market. The confidence to cut imports at a critical moment comes from China's massive strategic petroleum reserves, which have also helped keep a lid on prices.

China's crude oil imports fell 29% year-on-year in May, freeing up substantial supply for other countries on the international market.

Dig deeper and the real story is structural. China has spent recent years aggressively building solar, wind, and hydropower, cutting its reliance on traditional fossil fuels. U.S. consulting firm Asia Group notes that even if Hormuz gets disrupted, China's reshaped energy system means its exposure stays relatively limited.

Liu Zhicheng, a researcher at the Academy of Macroeconomic Research under the National Development and Reform Commission, told China News Service that the key to China's response is its comprehensive "ensuring supply and stabilizing prices" policy package. That package has headed off panic over global oil supply and cooled the risk of stagflation. Backed by a solid energy supply system and its strategic reserves, China has kept procurement rational and orderly, avoiding speculative buying and excessive stockpiling while managing refined oil prices directly. These steps protect global energy security and keep supply chains stable.

In effect, China has blocked oil shortages and price spikes from cascading through industrial sectors, kept production running steadily, and kept upstream and downstream links smooth, easing the disruption risks that geopolitical conflict tends to trigger.

That is the "second rescue" in a nutshell. Structural resilience, industrial upgrading, green transformation, and steady macro-control: these are the tools China used to hold a turbulent global economy steady.

Liu sees a bigger story here than oil. This is a demonstration of China's governance capacity under external shock, and proof of the significant role it now plays in keeping the global economy upright.