This graphic is compiled from some of the graphics in the WORLD SUBMARINES book. I included all SSN classes currently in service, plus the French Suffren Class (Barracuda) and Brazilian Álvaro Alberto Classes which are not yet in service. India also operates a single AKULA SSN on lease from Russia.
USS Jimmy Carter (SSN-23) Special Mission submarine
Sweden's nuclear powered submarine project (A-11A)
HUSKY Class future attack submarine
World survey of AIP submarines
SIERRA Class SSN
USS Seawolf (SSN-575)