Coordinating carrier and SSGN cruise-missile strikes

Can an SSGN replace a carrier as a long-range strike asset?

No; their reach and supporting roles differ, but using both together can create a more confusing and effective missile attack.

An SSGN's missile range differs from the combined reach of a carrier aircraft and its weapon, so the two assets serve complementary roles. Coordinated launches from different directions complicate warning and attribution because defenders must decide whether incoming missiles came from the carrier force or the submarine. The resulting attack is denser and harder to interpret. Employing both assets also preserves the carrier's wider aviation functions while adding the submarine's concealed missile capacity.