If the cumulative damage to a ship required more than 5 turns to repair, the ship was destroyed.

The following symbols signify damage to a ship's systems, which could have any or all of the following effects:

She obtained four torpedo hits with unconfirmed damage to a ship 15 August 1942, and terminated her patrol at Dutch Harbor, Alaska.

The North Korean Central News Agency released a response to the investigation on 28 May 2010, asserting, among other things, that it is unbelievable that part of a torpedo doing so much damage to a ship would survive: