38 years ago today, December 31, 1987 (November 11, 1987), the first long-range flight of our nuclear submarines. December 31, 1987, the first long-range flight training of our naval nuclear submarines was successful. The submarine forces cadres and sailors drive nuclear submarines, completed the training tasks on the vast ocean, created the record of the longest underwater flight time, the longest distance and the highest average speed of our naval submarines. participating in this long-range flight training nuclear power submarine, is our own design and manufacture, all the machinery and equipment are domestic. It has great navigation strength, high navigation speed, long diving time, good performance and other characteristics. Nuclear power submarine long-range flight training, is a new achievement in the modernization