To add: the test depth for the Virginia-class submarines is 240 meters. The previous Seawolf-class had a test depth of 490 meters. The average depth of the Pac

To add: the test depth for the Virginia-class submarines is 240 meters. The previous Seawolf-class had a test depth of 490 meters. The average depth of the Pacific ocean is around 4000 meters. The average depth of the Atlantic is about 3600 meters.