Images released by the Office of the South Korean President, commonly known as the Blue House, show the country's first hypersonic glide vehicle (HGV) creating a massive column of water as it plunged into the sea off Chungcheong province during a test on 8/10.

According to an analysis by Joseph Trevithick, editor of the US military news site War Zone, South Korea's HGV has a wedge-like shape, with distinct upper and lower surfaces. The projectile features several stabilizing fins at its rear, one of which appears shorter.

South Korea's hypersonic glide vehicle departs its launch pad on 8/10. Photo: The Blue House

Trevithick noted that the South Korean HGV remained intact until it impacted the sea, which is significant because projectiles traveling at hypersonic speeds typically deform due to extreme atmospheric friction.

"This type of weapon is highly complex technically and presents many challenges, even for nations with extensive experience in this field," Trevithick stated.

A close-up of South Korea's hypersonic glide vehicle tested on 8/10. Photo: The Blue House

The Blue House reported that after launching from the Anheung test site, the HGV successfully separated from its booster stage and flew along a predetermined trajectory at hypersonic speed without incident.

The test aimed to validate the HGV's core technologies for hypersonic flight, including the performance of ultra-high-temperature resistant materials, navigation, control, and low-altitude maneuverability.

South Korean officials have not yet disclosed details regarding the HGV's flight range or maximum speed. The guidance mechanism for the mid-course and terminal phases of this hypersonic glide vehicle also remains undisclosed.

South Korea's hypersonic glide vehicle plunges into the sea on 8/10. Photo: The Blue House

HGVs, which lack their own engines, must be carried to optimal altitude and speed, typically by existing ballistic missile booster stages. The HGV then separates and glides toward its target at speeds of at least Mach 5, equivalent to over 6,200 km/h, capable of performing maneuvers and changing direction during flight.

These characteristics differentiate HGVs from traditional ballistic missiles, making them extremely difficult for existing air defense systems to track or intercept.

Their ability to penetrate enemy air defenses and high speed make hypersonic weapons particularly attractive for targeting high-value assets that require immediate attack.

President Lee Jae Myung and South Korean officials inspect a mobile launcher for the Hyunmoo-5 ballistic missile in Anheung on 8/10. Photo: The Blue House

It remains unclear which booster stage South Korea utilized for the HGV. Images released on 8/10 showed President Lee Jae Myung and South Korean officials inspecting a mobile launcher for the Hyunmoo-5 ballistic missile in Anheung, though it is uncertain if this system was involved in the launch.

The Hyunmoo-5 is a relatively new weapon, slated for deployment by South Korea in late 2025. Despite its massive size and weight of up to 35 tons, the Hyunmoo-5 is classified as a short-range missile, capable of striking targets 300-1,000 km away. This classification is reportedly due to its exceptionally large warhead, weighing approximately 7.7 tons.

By Nguyen Tien (Source: Yonhap, War Zone, AP)