It is noteworthy, given the speed of fleet carriers and the slow speed of submarines that more aircraft carriers were sunk by sub-launched torpedoes than other causes.
Of the eleven USN carriers lost in combat, four were lost to submarines.
USS Yorktown (CV-5)
USS Wasp (CV-7) - Later Scuttled By USN
USS Liscomb Bay (CVE-56)
USS Block Island (CVE-21)
Of eight RN carriers lost in combat, five were lost to submarines.
HMS Courageous
HMS Eagle
HMS Ark Royal
HMS Audacity
HMS Avenger
In total, the Wallies lost nineteen aircraft carriers in combat, nine of which to submarine launched torpedoes. Of the other ten carrier losses; HMS Dasher exploded allegedly due to poor fuel vapor handling, HMS Glorious and USS Gambier Bay were lost to surface gunfire, while the other seven were lost to aerial attack, sometimes forcing friendly-fire scuttling.
This obviously supports the idea of having your submarines in the right place at the right time, rather than having them sprint to catch the enemy CBG.
Thanks for that, it also suggests the Japanese doctrine of using the subs vs capitol ships was not entirely wrong. Their subs did as well or better than the IJN carriers in putting US carriers out of action.