In a shocking 1981 NATO exercise, a Canadian diesel-electric submarine successfully penetrated a U.S. aircraft carrier strike group and notionally “sank” the USS Dwight D. Eisenhower. -The carrier, in adjusted inflation dollars,

In a naval exercise, a modest $100M Swedish submarine stunned the U.S. Navy by “sinking” a $6B supercarrier — a result that reshaped views on stealth warfare.

A triad of SSGs, SSKs, and SSNs would comprise a forbidding implement of access denial for the US Navy in the Indo-Pacific.