The Huahai JHR‑4 Rocket Parachute Aerial Flare is a SOLAS- and IMO-approved distress signaling device designed for maritime emergencies, capable of alerting rescuers over long distances. Upon launch, the flare rockets vertically to approximately 300 m before deploying a bright red flare suspended by a parachute, ensuring prolonged visibility. It produces intense red light with a luminous intensity of at least 30,000 candelas and burns for a minimum of 40 seconds, making it highly effective in night, fog, or adverse weather conditions. Housed in a waterproof casing, it is easy to handle and operate from ships, lifeboats, or life rafts while following safety protocols. The parachute descent maximizes hang time, improving detection by nearby vessels or aircraft. Lightweight and compact, it can be stored in survival kits or emergency compartments without occupying much space. With a typical shelf life of 3–4 years, monitoring expiration ensures reliable performance in emergencies. Overall, the JHR‑4 flare is a critical life-saving tool that provides rapid, highly visible, and dependable signaling at sea.