第四类潜艇SSGT潜艇是英国BMT公司推出的一种概念潜艇。它第一次将燃气轮机应用于潜艇,有着接近核潜艇的水下机动性,造价和噪声却比核潜艇低。从动力系统上看,它是潜艇设计史上的一个突破,当称为第四类潜艇。它所依赖的新技术有望在2012年准备就绪,在201 5年前后服役。 The fourth type of submarine SSGT submarine is the British BMT company introduced a concept submarine. For the first time, it applies gas turbines to submarines, has underwater mobility close to that of nuclear submarines, and costs and noise are lower than nuclear submarines. From the power system point of view, it is a breakthrough in the history of submarine design, when called the fourth category submarines. The new technology it relies on is expected to be ready by 2012 and service around 2015.