What unit of speedboat is Huaying 389?

Huaying 389-"Tumbler at Sea" belongs to Ningbo Base of Donghai Rescue Bureau of the Ministry of Transport. This rescue ship is an all-weather life rescue ship at sea. It has unique design, excellent performance, speed 18 knots, and automatic floating ability. When carrying 43 people and sinking in bad sea conditions, it can automatically float within 10 second. Known by the industry as "the tumbler at sea". The high-speed rescue boat is suitable for all-weather rescue of marine life 50 nautical miles offshore, especially for fishing boats and small and medium-sized ships. Alarm telephone number: 0574-86069999