低质量船舶就是低于国家标准未按船检规范、规程、规则建造检验发证的船舶。它是一个历史特定阶段发展的产物。这类船舶潜藏着极大事故隐患,特别是船长超过50米以上横骨架式的船舶,由于总纵强度不够,导致船体断裂发生沉船重大事故,安全岌岌可危,已引起高度重视。 Low-quality ship is below the national standard not according to the ship inspection norms, rules and regulations to build inspection and certification of the ship. It is a product of the development of a particular stage of history. Such ships are potentially hidden in serious accidents. In particular, ships of more than 50 meters in length, which have a ship with a length of more than 50 meters, have drawn great attention due to the insufficient longitudinal strength and the serious accidental shipwreck caused by the breaking of the ship’s hull.