On November 14, 2022, the underwater exploration vessel "Long Rescue Survey 3" constructed by Jiangsu Tongyang Shipbuilding Co., Ltd. was successfully handed over.

The ship is made of steel, single hull, single bottom (partially double bottom), single deck, forward leaning bow, and square rounded stern. It has a fully welded transverse skeleton structure, three deck rooms, and is propelled by dual engine double propeller electric propulsion with dual flap rudder; The main dimensions of the vessel are 47.0 meters x 12.2 meters x 3.6 meters x 2.4 meters (total length x width x depth x design draft), with a design speed of approximately 23.0 kilometers per hour, a endurance of 120 hours, a self-sustaining capacity of 20 days, and a seating capacity of 16 people. Long Rescue Test 3 "is an auxiliary vessel for salvage engineering, equipped with underwater detection and diving operation support functions. It can conduct emergency search and detection of sunken ships (objects) underwater, and complete the necessary underwater diving operations for emergency rescue and salvage.

”The construction of the "Chang Jiu Ce 3" has played a crucial role in the development of the Yangtze River Economic Belt, strengthening the emergency rescue and salvage capabilities of the Yangtze River mainline, and ensuring the overall efficiency of the 1000 ton emergency rescue and salvage crane ship that has been built.