A sub's Test Depth is generally set at two thirds design depth for US submarines and four sevenths design depth for the British Royal Navy, and is the maximum depth at which a submarine is allowed to operate during peacetime.

一艘潜艇的深度测试通常被设定为美国潜艇设计深度的三分之二和英国皇家海军设计深度的七分之四，并且是和平时期允许潜艇下潜的最大深度。