The debate continued with the following contribution by Lieutenant Commander Anthony T, Dunn, U.S. Navy (Retired)"In the case of the USS Scorpion, we know her location, but not the event, or events, that led to her loss. We know from the site survey that she exceeded crush depth and imploded." Naval architect Captain Harry Jackson commented that her hull failure was textbook, i.e. it failed where a submarine exceeding crush depth should fail.