You need to find the carrier first, ocean is a huge place. If you found and got close you do not need to coordinate single sub will do the job. But getting that

You need to find the carrier first, ocean is a huge place. If you found and got close you do not need to coordinate single sub will do the job. But getting that sub there is non-trivial. You could ambush the carrier as it transits a straight but that will only work as open strike at the start of the war